SALES ANALYSIS INSTITUTE.
Studies in the science and art of selling. Reference book no.1-5, 6-10. Prepared by the Sales Analysis Institute especially for the use of Sinclair Refining Co.
SALES ANALYSIS INSTITUTE. Studies in the science and art of selling. Reference book no.1-5, 6-10. Prepared by the Sales Analysis Institute especially for the use of Sinclair Refining Co. © 24May37, AA236745; 10Jun37, AA237747. Harold E. Ingram (A); 1Jul64; R340455-340456.
Harold E. Ingram|A