@article {33348,
	title = {Biological activity and suitability for plant growth of four overburden types used in reclamation of extracted oil sands},
	year = {1982},
	institution = {University of Alberta, Department of Botany},
	author = {Danielson, R. M. and Visser, S. and Griffith, C. and Parkinson, D.}
}
