@article {28616,
	title = {Shell thickness, DDE levels in eggs, and reproductive success in common terns (Sterna hirundo), in Alberta},
	volume = {49},
	year = {1971},
	pages = {69-73},
	publisher = {Canadian Journal of Zoology},
	url = {http://article.pubs.nrc-cnrc.gc.ca/RPAS/RPViewDoc?_handler_=HandleInitialGet\&calyLang=eng\&journal=cjz\&volume=50\&articleFile=z72-130.pdf},
	author = {Switzer, B. and Lewin, V. and Wolfe, F. H..}
}
