Ont.) International Symposium on Problems Related to the Redefinition of North American Vertical Geodetic Networks (2nd : 1980 : Ottawa profile picture

Ont.) International Symposium on Problems Related to the Redefinition of North American Vertical Geodetic Networks (2nd : 1980 : Ottawa

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[Proceedings]: second International Symposium on Problems Related to the Redefinition of North American Vertical Geodetic Networks: Ottawa, Canada, May 26-30, 1980 /sponsors, Canadian Institute of Surveying, Surveys and Mapping Branch, Department of Energy, Mines & Resources; co-sponsors, International Association of Geodesy ... [et al.].. --