8vo. Volume I: Depth and Diversity: xv, 437 pp. frontispiece map / Volume II: Life in the Cities, Towns, and Countryside: xv, 438 pp, frontispiece map, publisher’s original pictorial wrappers, biblio. index, light shelf wear to spine extremities, previous owner’s name inscribed verso front & lower cover,otherwise copy in very good condition, Natural History Press, New York, 1970.