What is a watershed?
Contributors: United States. Natural Resources Conservation Service
Edition: Rev. Sept. 1994, slightly rev. Nov. 1999
Series: Program aid -- no. 420; Program aid (United States. Dept. of Agriculture) -- no. 420
Publisher: U.S. Dept. of Agriculture, Natural Resources Conservation Service
Published: 1999
Place of publication: [Washington, D.C.]
Language: eng
Subjects: Watersheds; Valley ecology
Notes: Shipping list no.: 2000-0147-P