Roberts, Elizabeth Ann2015-05-122015-05-122001https://scholarworks.montana.edu/handle/1/8170enVegetation mappingInvasive plantsSpotted knapweedKnapweedsApproximation theoryNumerical analysisRange managementSampling and modeling plant infestations : alternatives for identifying invasive plant distributions in rangeland environmentsThesisCopyright 2001 by Elizabeth Ann Roberts