Special report on the trap dykes and Azoic rocks of southeastern Pennsylvania. By T. Sterry Hunt. Part I. Historical introduction.
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TextSeries: Report of progress (Geological Survey of Pennsylvania) ; E.Publication details: Harrisburg, Pub. by the Board of commissioners for the Second geological survey, 1878.Description: Exxi, E253, 2, [1] p. front. (map) 23 cmSubject(s): LOC classification: - QE653 .H94
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At head of title: Second geological survey of Pennsylvania: 1875.
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