Rock drilling /
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Main Authors: | , |
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Format: | Government Document Electronic eBook |
Language: | English |
Published: |
Philadelphia, Pennsylvania :
Work Projects Administration, National Research Project : Department of the Interior, Bureau of Mines,
1940.
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Series: | Mineral technology and output per man studies ;
rept. no. E-11. |
Subjects: | |
Online Access: | CONNECT |