Precalculus mathematics / Kenneth B. Henderson, Zalman Usiskin [and] Wilson M. Zaring. Henderson, Kenneth B. Usiskin, Zalman, joint author. Zaring, Wilson M., joint author. Mathematics. Precalculus. QA39.2 .H44 517.1 HEP Includes index. New York : McGraw-Hill, 1971. 1971. 1971 Text ix, 704 p. : eng