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Material Type: | Internet resource |
---|---|
Document Type: | Book, Internet Resource |
All Authors / Contributors: |
Geo H Ashley |
OCLC Number: | 1391746 |
Notes: | At head of title: Pennysylvania Geological survey, Fourth series. |
Description: | 16 p. : incl. tables ; 23 cm. |
Contents: | The undeveloped mineral resources of Pennsylvania / Geo. H. Ashley -- The minerals of Pennsylvania: iron ores of Pennsylvania / William O. Hickok, IV -- The minerals of Pennsylvania: non-metallic minerals / R.W. Stone. |
Series Title: | Bulletin M, 18-A. |
Responsibility: | introduction by George H. Ashley. |
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