@article {33870,
	title = {Microbial activity and mycorrhizal potential of four overburden types used in the reclamation of extracted oil sands},
	volume = {63},
	year = {1983},
	pages = {363-375},
	publisher = {Canadian Journal of Soil Science},
	author = {Danielson, R. M. and Visser, S. and Parkinson, D.}
}
