@article {37177,
	title = {The yield-grade relationship in the extraction of bitumen from oil sands},
	volume = {5},
	year = {1989},
	pages = {195-201},
	publisher = {AOSTRA  Journal of Research},
	author = {Crickmore, P. J. and Schulte, R. and Cleaver, J. A. S.}
}
