Twelvetrees, W. H. 1848-1919. On cement materials at West Arm, by W.H. Twelvetrees ... - Hobart, Tasmania, J. Vail, government printer, 1914. - 2 p. l., 18 p. fold. map. 22 cm. - Tasmania. Geological survey. Geological survey report no. 4 . At head of title: Tasmania. Dept. of Mines. LCCN: gs 15000304 Subjects--Topical Terms: Cement--Australia--Tasmania. LC Class. No.: TN122.T3 / A37 no. 4