Detra, D. E., & Cooley, E. F. (1988). A modification of the U.S. Geological Survey one-sixth order semiquantitative spectrographic method for the analysis of geologic materials that improves limits of determination of some volatile to moderately volatile elements. Dept. of the Interior, U.S. Geological Survey.
Chicago Style (17th ed.) CitationDetra, D. E., and E. F. Cooley. A Modification of the U.S. Geological Survey One-sixth Order Semiquantitative Spectrographic Method for the Analysis of Geologic Materials That Improves Limits of Determination of Some Volatile to Moderately Volatile Elements. [Reston, Va.]: Dept. of the Interior, U.S. Geological Survey, 1988.
MLA (9th ed.) CitationDetra, D. E., and E. F. Cooley. A Modification of the U.S. Geological Survey One-sixth Order Semiquantitative Spectrographic Method for the Analysis of Geologic Materials That Improves Limits of Determination of Some Volatile to Moderately Volatile Elements. Dept. of the Interior, U.S. Geological Survey, 1988.