Early trailer sold by Alberta Trailer Company, Calgary, Alberta. 

Alberta Trailer Sales lot, Edmonton, Alberta. 

Alberta Trailer Hire utility trailer for rent, Calgary, Alberta. 

Early utility trailer built by Alberta Trailer Hire, Calgary, Alberta. 

Ron Southern with Alberta Trailer Hire rental trailer, Calgary, Alberta. 

Early utility trailer built by Alberta Trailer Hire, Calgary, Alberta. 

Trailer built by ATCO Industries, Calgary, Alberta. 

Automobile pulling travel trailer rented from Trans-Canada Rent-a-Trailer, built by ATCO Industries, Calgary, Alberta. 

Alberta Trailer Sales lot, Edmonton, Alberta. 

Alberta Trailer Sales office, Edmonton, Alberta. 

Alberta Trailer Sales lot, Calgary, Alberta. 

Truck in garage rented by Southern family to build trailers, Calgary, Alberta. 

ATCO house trailers at dam site, Alberta. 

ATCO Industrial trailer, Calgary, Alberta. 

Southern family and trailers built by ATCO Industries, Calgary, Alberta. 

ATCO trailers on lot, Calgary, Alberta. 

Car-top carrier of Alberta Trailer Hire, Calgary, Alberta. 

Donald Southern at Alberta Trailer Sales lot, Calgary, Alberta. 

Jerry Kiefer studying plans for house trailers in ATCO Industries factory, Airdrie, Alberta. 

Interior of ATCO Industries factory, Airdrie, Alberta. 

Interior of ATCO Industries factory, Airdrie, Alberta. 

Roadway Industries truck, Edmonton, Alberta. 

ATCO Industries factory, Airdrie, Alberta. 

Donald Southern at dedication of ATCO Centenary Park, Calgary, Alberta. 

Utility trailer made by United Trailer Company, Calgary, Alberta. 

Automobile pulling trailer stopped at auto court, Wetaskiwin, Alberta. 

Joe Semotiuk and Bill Budnick, Edmonton, Alberta. 

Dedication of ATCO Centenary Park, Calgary, Alberta. 

Trailer made by United Trailer Company, Calgary, Alberta. 

United Trailer Company, Calgary, Alberta. 

Trailer made by United Trailer Company, Calgary, Alberta. 

Portable seed trailer made by United Trailer Company, Calgary, Alberta. 

Jerry Kiefer in his office at ATCO Industries factory, Airdrie, Alberta. 

Portable trailer made by United Trailer Company, Calgary, Alberta. 

Truck hauling trailer made by United Trailer Company, Calgary, Alberta. 

United Trailer Company, Calgary, Alberta. 

Trailer lab being hoisted uphill 

Portable steel frame made by United Trailer Company, Calgary, Alberta. 

Trailer camp for Trans Mountain Oil Pipe Line construction workers, Red Pass Junction, British Columbia. 

Brenda Todd, Miss Outdoors, Calgary, Alberta. 

Big 4 Transfer and Storage Company car and trailer, Edmonton, Alberta. 

Inland Trailer Sales, Lethbridge, Alberta. 

Inland Trailer Sales, Lethbridge, Alberta. 

Imperial Oil Company trailer truck, Canada. 

Emergency sleeping trailer for Calgary Stampede, Calgary, Alberta. 

Wally Byam Airstream trailer caravan, Calgary, Alberta. 

Imperial Oil Company tractor-trailers at warehouse, Ontario. 

Fleming family arriving in Calgary, Alberta after their cross-Canada road trip. 

Imperial Oil Company tank semi-trailer bunker, Canada. 

Canadian Freightways trailer, Vancouver, British Columbia.