Salem Press Reference ShelfSalem History is a robust online database that includes the complete content of printed reference sets. Purchasing printed reference delivers online access at no additional cost. Salem currently offers this service with four series of historical reference:
Milestone Documents - A new, primary source series (sets include Milestone Documents - American History, Milestone Documents - African American History, Milestone Documents - World History, Milestone Documents - American Leaders, Milestone Documents - World Religions ... all sets also available in print)
The Decades - Salem's critically acclaimed American history series
Great Lives from History - The definitive, worldwide biographical resource
Great Events
Encyclopedia of Mathematics and Society (also available in print)