1. Pesticides in streams draining agricultural and urban areas in Colorado;Kimbrough;Environ. Sci. Technol.,1996
2. Agricultural pesticide use in coastal areas: A national summary;Pait,1992
3. Pesticides in surface waters: distribution, trends, and governing factors;Larson,1997
4. Pesticide industry sales and usage: 1992 and 1993 market estimates;Aspelin,1994
5. Pesticide industry sales and usage: 1994 and 1995 market estimates;Aspelin,1997