Brock, Luther A. How to communicate by letter and memo [by] Luther A. Brock. - New York, McGraw-Hill [1974] "Putting learning to work": p. [1]-176 (2d group) ISBN: 0070080437 LCCN: 73019827 Subjects--Topical Terms: Commercial correspondence. LC Class. No.: HF5726 / .B796 Dewey Class. No.: 651.7/4