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12
K-bentonites of the Ordovician Decorah Subgroup, Upper Miss..
correlation by chemical fingerprinting
Circular / Illinois State Geological Survey. Department of Registration and Education, State of Illinois ; 537
Copies:
Zentrale:Magazin bc 0469-537
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14
Lithostratigraphy and depositional environments of the Maqu..
Circular / Illinois State Geological Survey. Department of Registration and Education, State of Illinois ; 528
Copies:
Zentrale:Magazin bc 0469-528