Copy Reference In the Homeland of Confucius
Year:1958 Issue:8
Column: ARTICLES
Author: VSEVOLOD OVCHINNIKOV
Release Date:1958-08-01
Page: 20-23
Full Text:
WHEN GEOLOGISTS want to peer into the earth's past, they are helped by the test drill. Biting deep below the surface, it brings up smooth cylindrical cores, each of which, to those who can interpret...
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