@article {38838,
	title = {Geographic variation in reproductive characteristics among Canadian populations of the common garter snake (Thamnophis sirtalis)},
	year = {1993},
	pages = {946-958},
	publisher = {Copeia},
	url = {http://www.jstor.org/stable/1447072?seq=2},
	author = {Gregory, Patrick T. and Larsen, Karl W.}
}
