U.S. Geological Survey Circular

U.S. Geological Survey Circular

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Production began in the early 1960a#39;s with the development of the Digital Graphics Recorder (DGR) system. The DGR system consisted of manual line- following digitizer connected to a computer system; it was capable of recording digitalanbsp;...

Title:U.S. Geological Survey Circular
Author:Geological Survey (U.S.)
Publisher: - 1983


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