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2 citations
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2 citations
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Birth and Death Dates 1874-1954
Article
Schellenberger, Andreas
(2014)
Robert Helbling---Pionier der Stereophotogrammetrie in den argentinischen Anden und in der Schweiz.
Cartographica Helvetica
(pp. 15-26).
(/isis/citation/CBB001421751/)
Article
Schellenberger, Andreas
(2014)
Robert Helbling -- Pioneer of Stereo Photogrammetry in the Andes in Argentina and in Switzerland.
Cartographica Helvetica
(pp. 15-26).
(/isis/citation/CBB001451864/)
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