Bituminous coal mining lectures,
Corporate Authors: | , |
---|---|
Format: | Book |
Language: | English |
Published: |
Altoona, Pa.,
Central Pennsylvania Coal Producers' Association
[1949]
|
Subjects: |
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Corporate Authors: | , |
---|---|
Format: | Book |
Language: | English |
Published: |
Altoona, Pa.,
Central Pennsylvania Coal Producers' Association
[1949]
|
Subjects: |