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General offices, the Westinghouse Air-Brake Co., Wilmerding, Pa
"G 2976" on negative. Detroit Publishing Co. no. 018674. Gift; State Historical Society of Colorado; 1949.
General offices, Whitney Warner Publishing Co., Detroit, Mich.
Title from jacket. Detroit Publishing Co. no. 043043. Gift; State Historical Society of Colorado; 1949.
General offices, Hiram Walker & Sons, Walkerville, Ont
"B 159" on negative. Detroit Publishing Co. no. 043815. Gift; State Historical Society of Colorado; 1949.