Wallace, Andrew H. Differential topology; first steps/ [by] Andrew H. Wallace. - New York: W.A. Benjamin, 1968. - xi, 130 p.: illus. (part col.), 22 cm. - Mathematics monograph series . Bibliography: p. 127-128. ISBN: 0805394850 LCCN: 67030456 //r81 Subjects--Topical Terms: Differential topology. Dewey Class. No.: 514.72 / W187d