Wales, Charles E. Guided engineering design : an introduction to engineering calculations / Charles E. Wales, Robert A. Stager, Thomas R. Long. - 2d ed. - St. Paul : West Pub. Co., c1981. - xii, 420 p. : ill. ; 25 cm. Includes index. ISBN: 0829903534 (pbk.) : $13.95 9780829903539 Subjects--Topical Terms: Engineering mathematics--Programmed instruction. LC Class. No.: TA330 / .W3 1981 Dewey Class. No.: 620.1/04/077