Percy H. Whiting.
The 5 great rules of selling.
R619861. The 5 great rules of selling. By Percy H. Whiting. © 27Oct47; A18591. Gene B. Whiting (W), Dorothy W. Howland & Percy H. Whiting, Jr. (C); 3Oct75; R619861.
Gene B. Whiting|W||Dorothy W. Howland & Percy H. Whiting, Jr.|C