Title Work Title No: 19120 Medium: Moving Image Date: 1960 (Release) Original Summary: "Presents Project Mohole's first oceanographic survey in search of a site near Puerto Rico where it might be possible to drill through the earth's crust to study the mantle beneath." - Summary from Worldcat. Part of the "Horizons of Science" series. Countries of Origin: U.S.A. Genres: Educational
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