Programmed business mathematics: concepts, skills, and applications. With the assistance of Stuart Margulies. In co-operation with the Center for Programmed Instruction, inc. Huffman, Harry. Business mathematics Study and teaching. Programmed instruction. HF5695 .H86 511.8 HUP New York, Gregg Pub. Division, McGraw-Hill [c1962- [c1962- 1962 Text v. eng