APA

(1965). Western Association of Canadian Highway Officials. 18th annual group conference, April 1965, Edmonton, Alberta. uo: .

Chicago

1965. Western Association of Canadian Highway Officials. 18th annual group conference, April 1965, Edmonton, Alberta. uo: .

Harvard

(1965). Western Association of Canadian Highway Officials. 18th annual group conference, April 1965, Edmonton, Alberta. uo: .

MLA

Western Association of Canadian Highway Officials. 18th annual group conference, April 1965, Edmonton, Alberta. uo: . 1965.