Third International Symposium on the North American Vertical Datum: NAVD Symposium '85, Rockville, Maryland, April 21-26, 1985 : Proceedings

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U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Ocean Service, 1985 - Surveying - 480 pages
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Contents

Preface 111
10
Status of NGS North American Vertical Datum NAVD Project
21
Status of the Vertical Control Networks 1n Mexico
37

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