Mississippi Department of Archives and History online electronic resource
(includes full access to the Mississippi State Sovereignty Commission Files): http://mdah.state.ms.us/arrec/index.php
University of Southern Mississippi digital library (includes the papers of many Freedom Summer volunteers): http://digilib.usm.edu/crmda.php
Wisconsin Historical Society (a large depository of Mississippi movement records): http://www.wisconsinhistory.org/research.asp
Library of Congress: http://www.loc.gov/library/libarch-digital.html
National Association for the Advancement of Colored People Papers: http://www.naacp.org/ also available on ProQuest
Civil Rights Movement Veterans: http://www.crmvet.org/
SNCC Legacy Project: http://www.sncclegacyproject.org/