Dyer, William E.2015-05-092015-05-091983https://scholarworks.montana.edu/handle/1/3923enSulfonylureasCanada thistleHerbicidesSoil movement and residual aspects of chlorsulfuron and its control of Canada thistle (Cirsium arvense (L.) Scop.)ThesisCopyright 1983 by William Edward Dyer