Engel Arthur Problem-solving strategies / Arthur Engel. - New York : Springer, 1998. - x, 403 p. : ill. ; 24 cm. - Problem books in mathematics . Includes bibliographical references (p. [397]-398) and index. ISBN: 0387982191 Subjects--Topical Terms: Problem solving LC Class. No.: QA63 Dewey Class. No.: 510/.76