harold farnsworth gray, sewerage in ancient and … · harold farnsworth gray, "sewerage in...
TRANSCRIPT
Harold Farnsworth Gray, "Sewerage in Ancient and Medieval Times," Sewage Works Journal, Volume 12, No. 5(Sept. 1940), pp. 939 - 946. Reprinted with permission from Sewage Works Journal. Copyright 1940 Water
Environment Federation, Alexandria, VA.