- Boston (Mass.), Water Board
- Digital Commonwealth
- Commonwealth of Massachusetts State Archives
4 of 6 which match those in MWW photographs album "Reservoirs of the Sudbury System" (nos. 5, 6, 8, 34); one is similar to no. 17. Massachusetts Metropolitan District Commission; Massachusetts Department of Conservation and Recreation; Massachusetts Water Resources Authority.
- No known copyright restrictions. No known restrictions on use.