1931, American Gas Engineering Journal, volumes 134-135, page 8:
A "Use the User" plan will also be conducted by the outside salesmen and by the floor sales people by telephone.
1962, George Meredith, Effective Merchandising with Premiums, page 140:
Use-the-user premium plans can be devised to fit a great many different types of businesses. Among the largest users of such techniques are appliance manufacturers and their dealers, […]
