@book{12630,
	author = {Weldon, Lyle W., and Blackburn, R. D., and University of Florida.},
	title = {Common aquatic weeds},
	publisher = {Agricultural Research Service, U.S. Dept. of Agriculture},
	year = {[1969]},
	series = {United States. Dept. of Agriculture] Agriculture handbook ;},
	address = {Washington]},
	note = {Cover title.}
}