1. Fluorimetric determinations of uranium;Centanni;Anal. Chem.,1956
2. A portable helium sniffer;Friedman;U.S. Geol. Surv., Open-File Rep. 75-732,1975
3. Geology of the El Tiro area;Graybeal,1982
4. Direct-current arc and alternating-current spark emission spectrographic field methods for the semiquantitative analysis of geologic materials;Grimes;U.S. Geol. Surv., Circ. 591,1968
5. North Silver Bell Tour Guide;Guilbert,1979