@book{26369,
	author = {Senécal, C. O.},
	title = {Colour printing of geological maps /},
	publisher = {F.A. Acland, printer,},
	year = {1925.},
	series = {Bulletin ; no. 39.},
	address = {Ottawa :},
	note = {At head of title: Canada. Department of Mines.}
}