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A Look Back in Time.
- Published in:
- Pennsylvania Geology, 2022, v. 52, n. 4, p. 17
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- Publication type:
- Article
A Fossil New to Science Discovered in York County, Pennsylvania.
- Published in:
- Pennsylvania Geology, 2022, v. 52, n. 4, p. 13
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- Publication type:
- Article
ADDENDUM-GEOLOGIC ORIGIN OF THE IRON ORES.
- Published in:
- Pennsylvania Geology, 2022, v. 52, n. 4, p. 10
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- Publication type:
- Article
The Metals of Cornwall, Pennsylvania.
- Published in:
- Pennsylvania Geology, 2022, v. 52, n. 4, p. 3
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- Publication type:
- Article
Our Work Continues.
- Published in:
- Pennsylvania Geology, 2022, v. 52, n. 4, p. 2
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- Publication type:
- Article