The clays and shales of Virginia west of the Blue ridge, by H. Ries and R. E. Somers.
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TextSeries: Virginia. Geological survey. Bulletin ; no. 20Publication details: Charlottesville, University of Virginia, 1920.Description: vii, 3, 118 p. illus., XIV pl. (incl. map in pocket) tables, diagrs. 26 cmSubject(s): DDC classification: - 557.55
- QE173 .A2 no. 20
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At head of title: Virginia Geological survey. University of Virginia. Thomas Leonard Watson, director.
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