Geology√

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Geology√

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Geology√

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Geology√

1974 Archival description results for Geology√

1974 results directly related Exclude narrower terms

Drilling a well and making the pipe for a well

Drilling a well and making the pipe for a well (Old Chinese prints). Salt wells drilled as early as Minor Han Dynasty (221 to 263 A.D.), wells ranging from 1,000 to 2,000 feet in depth (Forbes, 1958, p. 174).

Results 586 to 600 of 1974