Underclay deposits of Somerset and eastern Fayette Counties, Pennsylvania :/ a geological, mineralogical, and chemical study on underclay beds in the Allegheny Formation of southwestern Pennsylvania /
Main Author: | Hosterman, John W. 1923-1991 |
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Language: | English |
Published: |
Washington : United States Government Printing Office, 1972 |
Series: |
Geological Survey Bulletin
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Physical Description: |
3, 17 stran : ilustrace + 1 mapa, 1 obrazová příloha |