| Type |  Book |
| ชื่อเรื่อง | Phosophorus removal with pickie liquor in an activated sludge plant / [Prepared] for the Environmental Protection Agency [by] Sewerage Commission |
| พิมพลักษณ์ | Washington : Environmental Protection Agency, Research and Monitoring ; for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1971 |
| รูปเล่ม | 143 p. : ill. ; 28 cm |
| หัวเรื่อง | Metals --Pickling --By-products [] |
| | Sewage --Purification --Activated sludge process [] |
| | Water --Phosphorus content [] |