D. E. Detra
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- Analytical results and sample locality map for stream-sediment and heavy-mineral-concentrate samples from the Desolation Canyon Wilderness study area (UT-060-068SA), Emery and Carbon counties, Utah
- Analytical results and sample locality map of heavy-mineral-concentrate samples from the Bristol/Granite Mountains (CDCA-256) Wilderness Study Area, San Bernardino County, California
- Analytical results and sample locality map of heavy-mineral-concentrate samples from the Carizzo Gorge Wilderness Study Area (CA-060-025A), San Diego County, California
- Analytical results and sample locality map of heavy-mineral-concentrate samples from the Fish Creek Mountains Wilderness study area (CDCA 372), Imperial County, California
- Analytical results and sample locality map of heavy-mineral-concentrate samples from the Jacumba/In-Ko-Pah Mountains wilderness study area (CDCA 368), Imperial County, California
- Analytical results and sample locality map of heavy-mineral-concentrate samples from the Newberry Mountains (CDCA 206) and Rodman Mountains (CDCA 207) wilderness study areas, San Bernardino County, California
- Analytical results and sample locality map of heavy-mineral-concentrate samples from the Sawtooth Mountains Wilderness Study area (CA-060-024B), San Diego County, California
- Analytical results and sample locality map of heavy-mineral-concentrate samples from the Southern Inyo Mountains (CA-010-056) Wilderness study area, Inyo County, California
- Analytical results and sample locality map of stream-sediment and panned-concentrate samples from the Inyo Mountains (CDCA 122), Hunter Mountains (CDCA 123), Panamint (CDCA 127), and Wildrose (CDCA 134) Wilderness Study Areas, Inyo County, California
- Analytical results and sample locality map of stream-sediment and panned-concentrate samples from the Slate Range Wilderness Study Area (CDCA), Inyo County, California
- Analytical results and sample locality map of stream-sediment, heavy-mineral-concentrate, and rock samples from the Beaver Creek Wilderness Study Area (CO-050-016), El Paso, Fremont, and Teller counties, Colorado