1. The determination of gold in geologic materials by neútron-activation analysis using fire assay for radiochemical separations;Rowe;U.S. Geological Survey Circular,1968
2. Distribution of gold in igneous rocks;Gottfried;U.S. Geological Survey Professional Paper,1972
3. 1982 compilation of elemental concentrations in eleven United States Geological Survey rock standards;Gladney;Geestandards Newsletter,1983
4. Gold content of USGS standard rocks;Schwarz;U.S. Geological Survey Professional Paper,1976