Pesticides in air and rainwater in the midcontinental United States, 1995 [electronic resource] : methods and data / by Michael S. Majewski ... [et al.].
Mode of access: Internet via the USGS web site. Address as of 07/09/08: http://pubs.usgs.gov/of/2007/1369/pdf/ofr20071369.pdf; current access available via PURL.
Note
Title from PDF title screen (viewed on Apr. 25, 2008).