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		No cover image available Principles of invertebrate paleontology by Shrock, Robert R \| Twenhofel, William H \| . Series: IRDC TS 6e : 1977Edition: 2nd rev. & enl. ed Language: English Publication details: New York ; McGraw-Hill, ; 1953Availability: Items available for loan: 2 Call number: 56 Shr(3), ... Place hold Add to cart (remove)
		No cover image available Sequence in layered rocks : a study of features and structures useful for determining top bottom or order of succession in bedded and tabular rock bodies by Shrock, Robert R \| . Series: Edition: Language: English Publication details: New York ; McGraw-Hill Book, ; 1948Availability: Items available for loan: 2 Call number: 552 Shr(2), ... Place hold Add to cart (remove)
		No cover image available Index fossils of North America by Shimer, Hervey W \| Shrock, Robert R \| . Series: Edition: Language: English Publication details: New York ; John Wiley, ; 1959Availability: Items available for loan: 1 Call number: 56(71) Shi. Place hold Add to cart (remove)

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