Manual of instructions for compiling reports of operating data for bituminous coal mines
for mines with an average daily productive capacity in excess of fifty tons ...
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Publication
1944 - Govt. Prtg. Off., Washington, District of Columbia
Language
English
Word Count
0 words, Guess
Page Count
0 pages
Identifiers
- OCLC Control Number42950533
- Open LibraryOL52367528M
Subjects
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