@article {28918,
	title = {On the relation between Picea pungens and Picea engelmannii in the Rocky Mountains},
	volume = {50},
	year = {1972},
	pages = {733-742},
	publisher = {Canadian Journal of Botany},
	url = {http://article.pubs.nrc-cnrc.gc.ca/RPAS/RPViewDoc?_handler_=HandleInitialGet\&calyLang=eng\&journal=cjb\&volume=50\&articleFile=b72-092.pdf},
	author = {Daubenmire, R.}
}
