Local:

Pocumtuck Valley Memorial Association: https://deerfield-ma.org/

Millers Falls Tools https://oldtoolheaven.com/millers-falls/mf.html

Museum of Our Industrial Heritage https://industrialhistory.org/

Montague Historical Society https://montaguearchive.org/

https://dspace.montaguearchive.org/home

Historic Deerfield: https://www.historic-deerfield.org/

Historic Northampton: https://www.historicnorthampton.org/

Franklin County Newspaper Archive: http://www.publicationarchive.com/ArchiveArticle.cfm?g=184

Montague Public Libraries Community History Archive (Newspapers): https://montague.advantage-preservation.com/

State:

Digital Commonwealth https://www.digitalcommonwealth.org/

Massachusetts Historical Society: https://www.masshist.org/

Their research page: https://www.masshist.org/masshistoryday/researchlinks

UMass Digital Collections: https://credo.library.umass.edu/

Their research page: https://www.umass.edu/history/academics/undergraduate/resources/online

New England History Guide: http://scua.library.umass.edu/services-at-scua/research-guides/regional-history/

The Boston Globe: https://libraries.state.ma.us/login?db=pq_globe&locid=mlin_w_montague

BPL History Resources: https://www.bpl.org/resources/history-and-political-science/

https://www.leventhalmap.org/collections/

National:

State Dept : Office of the Historian: https://history.state.gov/

National Archive: https://www.archives.gov/

Library of Congress: https://LOC.gov

https://www.loc.gov/collections/sanborn-maps/about-this-collection/

American Historical Association’s list of vetted history resources: https://www.historians.org/resource/vetted-resources-us-history/

Internet Archive: https://archive.org/