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County-level estimates of nitrogen and phosphorus from commercial fertilizer for the conterminous United States, 1987-2006
- Author / Creator
- Available as
- Online
Details
- Creator
- by Jo Ann M. Gronberg and Norman E. Spahr
- Format
- Books
- Language
- English
- Contributors
- Publication
-
- Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2012
- Physical Details
-
- 1 online resource (vi, 20 pages) : color illustrations
- data file
- OCLC
- ocn819334666
- Title from title screen (viewed on Nov. 26, 2012).
- "National Water-Quality Assessment Program."
- Includes bibliographical references (pages 17-18).