TY - BOOK T1 - A reconnaissance study of radon levels in soils developed on the Upper Cretaceous Pierre Shale just above the Sharon Springs Member in the Missouri River Valley in southeastern South Dakota and northeastern Nebraska DA - 1992. CY - [Denver, CO] : AU - Dickinson, Kendell A., VL - 92-592 CN - I 19.76: PB - U.S. Dept. of the Interior, Geological Survey : PB - [Books and Open-File Reports Section, distributor], PP - [Denver, CO] : PY - 1992. N1 - Distributed to depository libraries in microfiche. N1 - Shipping list no.: 93-0957-M. ID - 198980 KW - Radon. KW - Radioactive substances in soils. KW - Radioactive pollution of soils KW - Radioactive pollution of soils TI - A reconnaissance study of radon levels in soils developed on the Upper Cretaceous Pierre Shale just above the Sharon Springs Member in the Missouri River Valley in southeastern South Dakota and northeastern Nebraska ER -