@article {31142,
	title = {Thermal hydrocracking of Athabasca bitumen : effect of recycle-gas purity on product yields and qualities},
	volume = {Canada CANMET report 77-36},
	year = {1977},
	pages = {28},
	institution = {Canada Centre for Mineral and Energy Technology},
	author = {Shah, A. M. and Pruden, B. B. and Denis, J. M.}
}
