@article {7419,
	title = {The biology of Canadian weeds: 44. Amaranthus retroflexus L., A. powellii S. Wats. and A. hybridus L.},
	journal = {Canad. J. Pl. Sci},
	volume = {60},
	year = {1980},
	month = {1980///},
	pages = {1215 - 1234},
	author = {S.E. Weaver and E.L. McWilliams}
}
