1. AspelinAL.1997. Pesticides industry sales and usage—1994 and 1995 market estimates. Technical Report 733‐R‐97‐002. U.S. Environmental Protection Agency Washington DC.
2. AspelinAL GrubeAH.1999. Pesticides industry sales and usage—1996 and 1997 market estimates. Technical Report 733‐R‐99‐001. U.S. Environmental Protection Agency Washington DC.
3. DonaldsonD KielyT GrubeA.2002. Pesticides industry sales and usage—1998 and 1999 market estimates. Technical Report EPA‐733‐R‐02‐001. U.S. Environmental Protection Agency Washington DC.
4. KielyT DonaldsonD GrubeA.2004. Pesticides industry sales and usage: 2000 and 2001 market estimates. Technical Report EPA‐733‐R‐04‐001. U.S. Environmental Protection Agency Washington DC.
5. GrubeA DonaldsonD KielyT WuL.2011. Pesticides industry sales and usage—2006 and 2007 market estimates. Technical Report EPA‐733‐R‐11‐001. U.S. Environmental Protection Agency Washington DC.