Author: Hanson, George F. ; Association of American State Geologists,
Title: Historical Directory of State Geological Surveys.
Description: Grand Forks, Nd., A.A. S.G., 1972. Trade Paperback., G+ in Wraps. Stapled Booklet. Light Wear. Pages: 33. Vertical Pen Mark Across Front Wrap. Text Block Clean & Tight.

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