Caldwell, Dan. 2001. Herbicide Contamination: A Growing Problem for Composters. News Release, College of Agriculture and Home Economics, Washington State University.
Economic Research Service, USDA. 1999. New U.S. Farm Regions. Issues
Center Web Briefing. June 28, 1999.
http://
www.econ.ag.gov/whatsnew/issues/regions/index.htm).
Hayes, H. M., R. E. Tarone, K. P. Cantor, C. R. Jessen, D. M. McCurnin, and R. C. Richardson. 1991. Case-control study of canine malignant lymphoma: positive association with dog owners use of 2,4-dichlorophenoxyacetic acid herbicides. JNCI, 83: 1226-1231.
Heine, Robyn. 2002. Dow AgroSciences Moves to Discontinue Residential Uses of Clopyralid in California. News Release, Dow AgroSciences LLC, based in Indianapolis, Indiana, USA.
Turf and Ornamental Reference for Plant Protection Products Web Site.
2001. C & P Press, Inc.
http://www.bluebooktor.
com/asp/free_b.asp.
Turf and Ornamental Reference for Plant Protection Products. 8th Ed. 1999. C & P Press, New York.
Turf and Ornamental Reference for Plant Protection Products. 5th Ed. 1996. C & P Press, New York.