Hull, Oswald. Frontiers of geography. - London, New York, Macmillan; St. Martin's Press, 1964. - x, 300 p., maps, 23 cm. Includes bibliographies. LCCN: 65008416 Subjects--Topical Terms: Geography.Economic geography. LC Class. No.: G122 / .H8 Dewey Class. No.: 910 / HUF 1964