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~institution:"Pennsylvania State College / Mineral Industries Extension Services"
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Coal
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Jones, Donald Campbell
(
contributor
); …
-
Pennsylvania State College / Mineral Industries …
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1950
-
3. ed
Persistent link: https://www.econbiz.de/10003169462
Saved in:
2
Coal
mining
; 2
Jones, Donald Campbell
(
contributor
); …
-
Pennsylvania State College / Mineral Industries …
-
1952
-
3d ed
Persistent link: https://www.econbiz.de/10003169466
Saved in:
3
Coal
mining
; 3
Jones, Donald Campbell
(
contributor
); …
-
Pennsylvania State College / Mineral Industries …
-
1954
-
3d ed
Persistent link: https://www.econbiz.de/10003169469
Saved in:
4
Coal
mining
Jones, Donald Campbell
(
contributor
); …
-
Pennsylvania State College / Mineral Industries …
-
1949
-
3d ed
Persistent link: https://www.econbiz.de/10002850520
Saved in:
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