Calgary Stampede, Burrell Mulkey on Farm Hand 

Borrel Mulkey on Baby Girl, Photo by Oliver 

Calgary Stampede : the authentic story of the Calgary Exhibition and Stampede : "The Greatest Outdoor Show on Earth," 1912-1964 

Who's who in the Northwest. Vol. 2 (1917) : a biographical dictionary of men and women : especially compiled for newspaper and library reference 

Alberta Gazette 1938, part 1