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Twitter.
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4
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Twitter (Firm) : Israel, Shel,
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2009
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1
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Two party systems -- United States.
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2010
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1
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U.S. states.
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2009
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1
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Ubiquitous computing
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2
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ʻUmar ibn al-Khaṭṭāb, Caliph, -644. : Ṣallābī, ʻAlī Muḥammad Muḥammad,
|
2007
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1
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Uncertainty (Information theory) -- Social aspects
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2
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|
Undergraduates. : Greetham, Bryan,
|
2009
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1
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|
Underground Railroad : Sterling, dorothy
|
1954
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1
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Underground Railroad -- Encyclopedias. : Snodgrass, Mary Ellen.
|
2008
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1
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Underground railroad -- Juvenile literature
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2
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Underwater exploration -- Fiction.
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2
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Unidentified flying objects. : Frissell, Bob,
|
2009
|
1
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Unified field theories. : Isaacson, Walter.
|
2009
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1
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Unilateral acts (International law) : Matlock, Jack F
|
2010
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1
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Unitarianism -- History. : ʻAta ur-Rahim, Muhammad.
|
2003
|
1
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|
United Arab Emirates
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2
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United Arab Emirates -- Biography. : al Habtoor, Khalaf Ahmad
|
2012
|
1
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|
United Arab Emirates -- Economic conditions. : Heard, David
|
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1
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|
United Arab Emirates -- History. : Heard, David
|
|
1
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|
United Arab Emirates -- Social life and customs. : Holton, Patricia
|
2007
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1
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United Nations.
|
2008
|
1
|
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|
United Nations -- Encyclopedias. : Moore, John Allphin,
|
2008
|
1
|
|
|
United Nations -- Encyclopedias, Juvenile.
|
2007
|
1
|
|
|
United Nations -- History.
|
2008
|
1
|
|
|
United States.
|
|
8
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|
|
United States -- Antiquities -- Anecdotes. : Karg, Barbara.
|
2008
|
1
|
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|
United States -- Armed Forces -- Biography -- Encyclopedias. : Axelrod, Alan,
|
2005
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1
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|
United States -- Armed Forces -- Dictionaries. : Tomajczyk, Stephen F.
|
2008
|
1
|
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|
United States -- Armed Forces -- Encyclopedias. : Axelrod, Alan,
|
2005
|
1
|
|
|
United States -- Armed Forces -- History -- World War, 1939-1945. : Schneider, Carl J.
|
2003
|
1
|
|
|
United States -- Armed Forces -- Military life -- History -- 19th century -- Sources.
|
2010
|
1
|
|
|
United States. Army. Cavalry -- History -- 19th century : Martinez, J. Michael
|
2007
|
1
|
|
|
United States. Army -- History -- War of 1812 -- Sources.
|
2010
|
1
|
|
|
United States. Army -- Recruiting, enlistment, etc : Bailey, Beth L.,
|
2009
|
1
|
|
|
United States -- Biography.
|
|
3
|
|
|
United States -- Biography -- Anecdotes. : DuBose, Fred.
|
2009
|
1
|
|
|
United States -- Biography -- Dictionaries
|
|
2
|
|
|
United States -- Biography -- Encyclopedias
|
2007
|
1
|
|
|
United States -- Boundaries -- History : Stein, Mark,
|
2008
|
1
|
|
|
United States. Bureau of Refugees, Freedmen, and Abandoned Lands.
|
2009
|
1
|
|
|
United States -- Capital and capitol -- History -- 18th century.
|
|
2
|
|
|
United States. Central Intelligence Agency -- Officials and employees -- Biography. : O'Connell, Jack,
|
2011
|
1
|
|
|
United States -- Church history -- 20th century : O'Toole, James M.,
|
2008
|
1
|
|
|
United States -- Civilization.
|
|
10
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|
|
United States -- Civilization -- 20th century -- Study and teaching. : Campbell, Neil,
|
2012
|
1
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|
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United States -- Civilization -- 21st century -- Study and teaching. : Campbell, Neil,
|
2012
|
1
|
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|
United States -- Civilization -- 1783-1865.
|
|
3
|
|
|
United States -- Civilization -- 1865-1918.
|
|
2
|
|
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United States -- Civilization -- 1945-
|
|
3
|
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