AMERICAN CULTURAL HISTORY
http://kclibrary.nhmccd.edu/decades.html

AMERICAN MEMORY PROJECT
of the LIBRARY OF CONGRESS
http://memory.loc.gov/ammem/index.html

A CHRONOLOGY OF U.S. HISTORICAL DOCUMENTS
http://www.law.ou.edu/hist

ILLINOIS BLUE BOOK—DIGITAL ARCHIVES PROJECT
http://www.idaillinois.org

ILLINOIS LABOR HISTORY SOCIETY
http://www.kentlaw.edu/ilhs