Terrestrial radioactivity and gamma-ray exposure in the United States and Canada

Online link https://doi.org/10.3133/ofr20051413
Description Flight-line databases and derived grids from aeroradiometric surveys across the US carried out during the 1970s
Originators Duval, Joseph S., Carson, John M., Holman, Peter B., Darnley, Arthur G.
Publication U.S. Geological Survey Open-File Report 2005-1413

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