The South Hadley History Room at the South Hadley Library is a valuable resource to do local history and to do genealogy.
They have book, maps, and internet resources.
The South Hadley High School yearbook – Gateway – collection is from 1947 to the present.
The Gridley Canney Collection
South Hadley Town Reports from 1889 to the present.
There are Street Listing by Wards and Streets from 1929 to the present.
Holyoke City Directories with South Hadley from 1884 to the 1990s
Fire District Reports
Municipal Light Board SHELD reports 1949 to the present
The Spotlight 1929 to 1936
South Hadley Phone Books
Know Your Town 1947 onward
Congregational Church of South Hadley Falls
Nice map collection
In Old South Hadley by Eastman
Geology of Old Hampshire County by Emerson
County Atlas of Hampshire (Massachusetts state book) – click to get PDF
The Power of Christian Benevolence by Hitchcock
The Old South Hadley Burial Ground 1976
Holyoke in the Great War
Hampshire County Gazetteer