Title from title screen (viewed on Apr. 15, 2009).
"May 2007."
Includes bibliographical references (page 9).
Mode of access: Internet from the NRCS Montana Office web site. Address as of 4/15/09: ftp://ftp-fc.sc.egov.usda.gov/MT/www/technical/invasive/Invasive%5FSpecies%5FTech%5FNote%5FMT12.pdf; current access available via PURL.