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U Exhibition Geo '71
5000 Years of Surveying
Exhibition Geo '71: 1.-8. September 1971: Exhibition of Historical Maps and Instruments: Stadtisches Museum Wiesbaden: Exhibition Catalogue. (On the occasion of the XIIIth International Congress of Surveyors.); Wiesbaden: Deutscher Verein fur Vermessungswesen, 1971.
[1971-114]
1971