Galovich, Steven. Doing mathematics ; an introduction to proofs and problem solving/ Steven Galovich. - Fort Worth Philadelphia: Saunders, Harcourt Brace Jovanovich, c1993. - vii, 196 p.: ill.; 23 cm. Includes bibliographies and index. ISBN: 0030928001 Subjects--Topical Terms: Mathematics. Dewey Class. No.: 510.7 / G178d