Title from title screen (viewed on Aug. 12, 2008). "Wildlife Services." "April 2002."
Mode of access: Internet at the U.S. Dept. of Agriculture, Animal and Plant Health Inspection Service web site. Address as of 8/12/08: http://www.aphis.usda.gov/publications/wildlife%5Fdamage/content/printable%5Fversion/fs%5Fwspgm.pdf ; current access available via PURL.