@article {31261,
	title = {Athabasca tar sands: occurrence and commercial projects, Chapter 5. In : Bitumens, asphalts and tar sands, G. V. Chilingarian and T. F. Yen, editors},
	volume = {Developments in Petroleum Science Volume 7},
	year = {1978},
	pages = {93-121},
	institution = {Elsevier},
	author = {Spragins, F. K.}
}
