Duval, J. S., & Riggle, F. E. (1999). Profiles of gamma-ray and magnetic data from aerial surveys over the conterminous United States (Release 2.). U.S. Dept. of the Interior, U.S. Geological Survey.
Chicago Style (17th ed.) CitationDuval, Joseph S., and Frederic E. Riggle. Profiles of Gamma-ray and Magnetic Data from Aerial Surveys over the Conterminous United States. Release 2. [Reston, Va.]: U.S. Dept. of the Interior, U.S. Geological Survey, 1999.
MLA (9th ed.) CitationDuval, Joseph S., and Frederic E. Riggle. Profiles of Gamma-ray and Magnetic Data from Aerial Surveys over the Conterminous United States. Release 2. U.S. Dept. of the Interior, U.S. Geological Survey, 1999.
Warning: These citations may not always be 100% accurate.