@booklet {23978,
	title = {Oil sands scientist : The letters of Karl A. Clark, 1920-1949},
	year = {1989},
	pages = {1-498},
	address = {Edmonton: University of Alberta Press/Alberta Culture and Multiculturalism},
	keywords = {Karl Clark, letters, oil sands},
	isbn = {0888641435; 9780888641434; 0888642288; 9780888642288; 1417591501; 9781417591503}
}
