American Centuries: View from New England (Memorial Hall Museum Online)
Connecticut River Homepage - biology, history, and geology information from Biology Department at UMass.
Digital Commonwealth - Massachusetts Collections Online
Digital Treasures- a central and western Massachusetts library project
Forbes Library links to local history resources - very useful gateway site
Hadley Historical Commission & Hadley Historical Society
Judd's History of Hadley - online preview from Google books
Massachusetts Historical Society
Salem Witch Trials: Documentary Archive and Transcription Project
Town of Hadley: A Historical Tour - includes impact of early Polish Immigration