The twinplex : a new stereoplotting instrument /

Bibliographic Details
Main Author:	Thompson, Morris M. (Morris Mordecai), 1912-2009 (Author)
Format:	Government Document eBook
Language:	English
Published:	Washington, D.C. : United States Department of the Interior, Geological Survey, 1950.
Series:	Geological Survey circular ; 82.
Subjects:	Analytical plotters (Photogrammetry) Photogrammetry > Instruments. Cartography > Technological innovations.
Online Access:	https://purl.fdlp.gov/GPO/gpo109762

Description
Item Description:	"July 1950."
Physical Description:	1 online resource (8 pages) : illustrations.