1. Spectral reflectance 0.4 to 2.0 microns of silicate rock powders;Adams;J. Geophys. Res.,1967
2. Secondary minerals and acid mine-water chemistry;Alpers,1994
3. Stable isotopes (O, H, S) distinguish sources of acid drainage at Penn Mine, California;Alpers;U.S. Geol. Surv. Circ.,1994
4. Hydrogeology and geochemistry of acid mine drainage in ground water in the vicinity of Penn Mine and Camanche Reservoir, Calaveras County, California: summary report: 1993–1995;Alpers;U.S. Geol. Surv. Water-Resour. Investig. Rep.,1999
5. Technical Guide;Analytical Spectral Devices,1999