@article {33031,
	title = {Influence of roll-out mats and ridging on the establishment of plant cover on an unamended coal spoil : a progress report for 1980},
	volume = {ENR technical report T/20-80},
	year = {1981},
	institution = {Alberta Energy and Natural Resources},
	author = {Takyi, S. K. and Leitch, R. H.}
}
