@article {7420,
	title = {The biology of Canadian weeds: 101. Helianthus tuberosus L.},
	journal = {Canad. J. Pl. Sci.},
	volume = {72},
	year = {1992},
	month = {1992///},
	pages = {1367 - 1382},
	author = {C.J. Swanton and P.B. Cavers and D.R. Clements and M.J. Moore}
}
