Using mathematics / Kenneth B. Henderson and Robert E. Pingry. Drawings by Henri A. Fluchere; end papers, illus., and charts by Graphics Institute. Henderson, Kenneth B. Pingry, Robert E. (Robert Eldon), 1914- joint author. Mathematics. QA39 .H42 510 HEU Includes index New York, McGraw-Hill [1955] [1955] 1955 Text 555 p. eng