Sadler, A. J., Understanding pure mathematics / A.J. Sadler, D.W.S. Thorning. - v, 602 p. : ill. ; 25 cm. Includes index. ISBN: 0199142432 (pbk) : ¹11.95 LCCN: gb 87011736 Nat. Bib. No.: GB87-11736 Subjects--Topical Terms: Mathematics--Examinations, questions, etc. LC Class. No.: QA43 / .S43 1997