- Massachusetts, Metropolitan Water and Sewerage Board
- Digital Commonwealth
- Commonwealth of Massachusetts State Archives
Print in album Photographs MWW electrolysis, Vol. 2. Massachusetts Metropolitan District Commission; Massachusetts Department of Conservation and Recreation; Massachusetts Water Resources Authority. Published in Seventh annual report of the Metropolitan Water and Sewerage Board for the year 1907 (1908), opp. p. 74.
- No known copyright restrictions. No known restrictions on use.