Nonpoint and point sources of nitrogen in major watersheds of the United States

by Larry J. Puckett.
Bok · Engelsk · 1994

Omfang	9 pages : : illustrations, maps ;
Emner	Nonpoint source pollution - United States. Water - Nitrogen content - United States. Water - Pollution - Point source identification. - United States
Hylleplass	TD427.N5 P83 1994