The University of San Francisco: Gleeson Library
Library with Yellow Flowers
Oxford Biblical Studies Online
Brill's Encyclopedia of Hinduism
Oxford Islamic Studies Online
Encyclopaedia Judaica
Encyclopedia of Buddhism
New Catholic Encyclopedia
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Urban Affairs / Urban Studies: Mapping

Social Explorer
Create maps on a variety of subjects with current and historical data from US Censuses.

Census Explorer
The U.S. Census Bureau's interactive mapping website.

Policy Map (Free Edition)
Created by a nonprofit organization called The Reinvestment Fund, PolicyMap is a Geographic Information System and mapping company. With the free version of PolicyMap, you can use a wide range of publicly available data to easily create maps.

Atlas of the Historical Geography of the U.S.
This website, created by the University of Richmond, is a digital edition of Charles O. Paullin and John K. Wright's Atlas of the Historical Geography of the United States, first published in 1932. The digital edition reproduces all of the atlas's nearly 700 maps. Many of the maps are enhanced in ways impossible in print, animated to show change over time or made clickable to view the underlying data.