1. Military water supply and purification Author(s): United States. War Department, author. Publication: Washington : U.S. Government Printing Office, August 1945 Subject(s): Water PurificationWater SupplyMilitary HygieneUnited States
2. Activated sludge studies, 1920-1922 Author(s): Illinois State Water Survey, author, issuing body. Publication: Urbana, Illinois : State of Illinois, Department of Registration and Education, Division of the State Water Survey, [1923] Subject(s): SewageWater PurificationIllinois
