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Geological Surveying by Helicopter. Nature 186, 521 (1960). https://doi.org/10.1038/186521b0
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DOI: https://doi.org/10.1038/186521b0
Nature volume 186, page 521 (1960)
Geological Surveying by Helicopter. Nature 186, 521 (1960). https://doi.org/10.1038/186521b0
Issue Date:
DOI: https://doi.org/10.1038/186521b0