@book{12458,
	author = {Hodgson, Jesse M., and United States.},
	title = {The nature, ecology, and control of Canada thistle},
	publisher = {Agricultural Research service, U.S. Dept. of Agriculture; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.,},
	year = {1968]},
	series = {United States. Dept. of Agriculture. Technical bulletin ;},
	address = {Washington]}
}