Soifer, Alexander Mathematics as problem solving/ Alexander Soifer. - 1st ed. - Colorado Springs: Center for Excellence in Mathematical Education, 1987. - 117 p.: ill.; 22 cm. Bibliography: p. 117. ISBN: 0940263009 (pbk.) LCCN: 86072215 Subjects--Topical Terms: Problem solving Dewey Class. No.: 510.7 / S683m