The geology of Centre County (Report of progress (Geological Survey of Pennsylvania) T4.)
by D'Invilliers, E. V. 1857-1928.
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Item Description: |
Analyses of Nittany Valley iron ores and limestones, by F.A. Genth and Otto Wuth: p. 385 T4-T4 395. |
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Physical Description: |
xviii T4, 464 T4, 8 p. front. (map) illus., fold. map (in pocket) diagrs. 23 cm. |