Evaluation of establishment of Cyphocleonus achates and its potential impact on spotted knapweed [electronic resource] / Nancy Sturdevant ... [et al.].
Imprint
[Missoula, MT : U.S. Dept. of Agriculture, Forest Service, Northern Region], Forest Health Protection, [2006]
Electronic reproduction. [Missoula, MT?] : U.S. Dept. of Agriculture, Forest Service, Northern Region, Mode of access: World Wide Web. System requirements: PDF reader.