Johnston, William Drumm, 1899- Physical divisions of northern Alabama, by William Drumm Johnston, jr. Prepared in cooperation with the United States Geological survey. - University, Ala., 1930. - 48 p. incl. 8 pl., maps, tables. 23 cm. At head of title: Geological survey of Alabama. Bibliographical foot-notes. LCCN: gs 30000294 Subjects--Topical Terms: Physical geography--Alabama. LC Class. No.: QE81 / .A15 no. 38