@article {33060,
	title = {Longitudinal physio-chemical and algae surveys of rivers flowing through the oil sands region of northeastern Alberta, Canada},
	volume = {25},
	year = {1981},
	pages = {465-522},
	publisher = {Nova Hedwigia },
	author = {Charlton, S. E. D. and Hickman, M. and Jenkerson, C. G.}
}
