Buckmaster, James L. 1904- Instrumental improvements in altimetry, by James L. Buckmaster and Atherton H. Mears. - Washington, 1958. - iii, 33 p. illus. 27 cm. LCCN: gs 58000252 Subjects--Topical Terms: Altimeter.Geology--Maps.Photographic surveying. LC Class. No.: QE75 / .C5 no. 405