Ulysses S. Grant Presidential Library http://www.usgrantlibrary.org/
Ulysses S. Grant Digital Library at Mississippi State University http://www.usgrantlibrary.org/collections/digital
Mississippi Department of Archives and History
http://www.mdah.ms.gov/new/
Mississippi Archaeological Association
http://www.msarchaeology.org/
Mississippi Heritage Trust
http://www.mississippiheritage.com/
Mississippi Gulf Coast Museum of Historical Photography http://www.msmohp.com/
Mississippi Main Street Association
http://www.msmainstreet.com/
Mississippi History Day
https://www.usm.edu/history/national-history-day-mississippi
Mississippi Professional Educators
https://www.mpe.org/