The twinplex : a new stereoplotting instrument / by Morris M. Thompson.

Bibliographic Details
Uniform Title:	Geological Survey circular ; 82.
Main Author:	Thompson, Morris M. (Morris Mordecai), 1912-2009 (Author)
Corporate Author:	Geological Survey (U.S.) (Issuing body)
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:	Connect to online resource - All users (Federal Depository Library Program Persistant URL)
Physical Description:	1 online resource (8 pages) : illustrations.
Format:	Government Document Electronic eBook

Description
Note:	"July 1950."
Call Number:	I 19.4/2:82 Online
Source of Description:	Title from title screen (viewed July 15, 2015).