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Marvin D. Helfer, geologist, demonstrates for scientists and newsmen aboard the USS ARGO [i.e. R/V Argo] the operation of the Surface Ship gravity meter. The ARGO is a vessel of the Scripps Institution of Oceanography of the University of California and is taking part in the Indian Ocean expedition

Marvin D. Helfer, geologist, demonstrates for scientists and newsmen aboard the USS ARGO [i.e. R/V Argo] the operation of ...