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1.
Stratigraphic significance and petrology of phosphate nodules at base of Niobrara Formation, east flank of Black Hills, South Dakota / by Harry A. Tourtelot and W. A. Cobban by Series: Shorter contributions to general geology | Geological Survey professional paper ; no.594-L
Material type: Text Text; Format: print ; Literary form: Not fiction
Language: English
Publication details: Washington, D.C. : United States Government Printing Office, 1968
Availability: Items available for loan: National Library of India (1)Call number: U.S 550.8 T 648.

2.
Stratigraphic significance and petrology of phosphate nodules at base of Niobrara Formation, east flank of Black Hills, South Dakota / by Harry A. Tourtelot and W. A. Cobban by Series: Shorter contributions to general geology | Geological Survey professional paper ; no.594-L
Material type: Text Text; Format: print ; Literary form: Not fiction
Language: English
Publication details: Washington, D.C. : United States Government Printing Office, 1968
Availability: Items available for loan: National Library of India (1)Call number: U.S 550.8 T 648.

3.
Stratigraphic significance and petrology of phosphate nodules at base of Niobrara Formation, east flank of Black Hills, South Dakota / by Harry A. Tourtelot and W. A. Cobban by Series: Geological Survey professional paper ; no.594-L | Shorter contributions to general geology
Material type: Text Text; Format: print ; Literary form: Not fiction
Language: English
Publication details: Washington, D.C. : United States Government Printing Office, 1968
Availability: Items available for loan: National Library of India (1)Call number: U.S 551.8975243 T 646 st.

4.
Stratigraphic significance and petrology of phosphate nodules at base of Niobrara Formation, east flank of Black Hills, South Dakota / by Harry A. Tourtelot and W. A. Cobban by Series: Geological Survey professional paper ; no.594-L | Shorter contributions to general geology
Material type: Text Text; Format: print ; Literary form: Not fiction
Language: English
Publication details: Washington, D.C. : United States Government Printing Office, 1968
Availability: Items available for loan: National Library of India (1)Call number: U.S 551.8975243 T 646 st.

                                                                           
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