The twinplex
Subtitle: a new stereoplotting instrument
By: by Morris M. Thompson
Series: Geological Survey circular -- 82; Circular (Geological Survey (U.S.)) -- 82.
Publisher: Department of the Interior Geological Survey
Published: 1950
Place of publication: [Washington, D.C.]
Language: eng
Subjects: Analytical plotters (Photogrammetry); Photogrammetry; Instruments
Notes: "July 1950."