The three sludge system for nitrogen and phosphorus removal /

"Presented at the 44th Annual Conference of the Water Pollution Control Federation, San Francisco, California (October, 1971)"--P. 1.

Overland flow treatment of raw wastewater with enhanced phosphorus removal /

Mode of access: Internet.

Handbook : Retrofitting POTWs for phosphorus removal in the Chesapeake Bay drainage basin.

"September 1987."

Report on the problem of street cleaning and snow removal in the city of Minneapolis, Minnesota.

Mode of access: Internet.

Compilation of statutes relating to soil conservation, marketing quotas and allotments, soil bank, Commodity Credit Corporation, price support, export and surplus removal, crop insurance, sugar payments and quotas, marketing agreements and orders, and related statutes.

Issued Jan. l, 1953- as U.S. Dept. of Agriculture. Agriculture handbook, no. 49, 79, 113, 192, 242, 281, 317, etc.

Removal of contaminated sediment from roof surfaces by sheet flow /

Mode of access: Internet.