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.  By David E. Detra and Elmo F. Cooley
Contributors: Cooley, E.F.
Publisher: Dept. of the Interior
Place of publication: Washington
Language: eng
Number of pages: 22
Subjects: Analytical geochemistry
Notes: 11