Radioactivity and uranium content, Sharon Springs member of the Pierre shale, Kansas and Colorado | Columnar sections of Sharon Springs member of Pierre shale in Wallace and Logan Counties, Kansas | Columnar sections of lower part of Pierre shale in Cheyenne, Kiowa, Crowley, and Pueblo Counties, Colorado | Columnar sections of lower part of Pierre shale in Las Animas County, Colorado | Gamma-ray logs of lower part of Pierre shale and upper part of Niobrara formation in Eastern Colorado

الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)

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