Dictionary of American History by 
Milestone Documents in American History by
Library of Congress (LC) call numbers are used by Hofheimer Library to indicate where on the shelves you will find a specific book or books on a specific topic. This system is used by most academic libraries. Full descriptions of the call number sytem can be found at the Library of Congress' web site.
History books are in the C, D, E and F sections in the library.
C – Civilization, Archaeology, Heraldry, Genealogy
D – World History
E-F History of the Americas
E11-143 - America (early history)
E151-889 - United States chronological (includes: Indians of North America. Colonial History. Revolution. Presidencies)
E605-625 Civil War primary source documents
F1-975 - United States local history by region
F1001-1145.2 - British America (including Canada)
F1170 - French America
F1201-3799 - Latin America. Spanish America
JV - International Migration. Colonies and colonization. Emigration and Immigration.
U - Military Science
V - Naval Science
These books can be found on the 2nd floor. At top of stairs, turn right and go past study rooms. At book stacks, the sections to your left and right contain history books by call numbers above.