MacKaye, Benton, 1879-1975. The new exploration : a philosophy of regional planning / Benton MacKaye ; with an introduction by Lewis Mumford. - Urbana : University of Illinois Press, 1962. Includes index. ISBN: 0917953436 (pbk.) LCCN: 62017516 Subjects--Topical Terms: Regional planning. LC Class. No.: GF51 / .M3 1962 Dewey Class. No.: 309.24 / MAC