Printed in Canada. Ontario Research Foundation. 1951. First edition. Cloth over boards. One book and 4 loose maps. Hardcover cloth (green) over boards with d/j and slipcase. 4to. xxii+284+[7 fold-out maps] pp. Illustrated with 81 b/w plate photographs (aerial and landscape), geological diagrams, and maps, including 7 fold-out maps, with.....