Provided by the Roper Center for Public Opinion Research at Cornell University, Roper iPoll is the largest collection of public opinion poll data with results from 1935 to the present. Roper iPoll contains nearly 800,000 questions and over 23,000 datasets from both U.S. and international polling firms. Surveys cover any number of topics including, social issues, politics, pop culture, international affairs, science, the environment, and much more. When available, results charts, demographic crosstabs and full datasets are provided for immediate download.
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Declassified Documents Index provides full text access to formerly U.S. government classified documents that Primary Source Media obtains as they are declassified.
History Resource Center: U.S. provides integrated access to over 4,000 historical (primary) documents, articles from more than 30 reference titles, and over 110 full-text journals covering themes, events, individuals and periods in U.S. history from pre-Colonial times to the present.
Historical Publications of the USCCR from its inception in 1957 A partnership of the United States Government Printing Office, The United States Commission on Civil Rights and the Thurgood Marshall Law Library, University of Maryland.
The database contains 40,000 records gathered from legislative groups, research institutions, public research agencies, universities, and scholars from around the world covering essential areas related to urban studies, including urban affairs, community development, urban history, and other areas of key relevance to the discipline. Coverage is from 1973 to the present.