||Harrison and Ponton's 1911-1912 map of the city of Calgary and environs
Ponton, Gerald M
||Harrison and Ponton Engineering and Surveying
|Harrison, Edward, and Gerald M Ponton. Harrison and Ponton's 1911-1912 map of the city of Calgary and environs. (Calgary, Alberta: Harrison and Ponton Engineering and Surveying, 1912).|
Available at the Family History Library.