Spectral reflectance properties (0.4-2.5 μm) of secondary Fe-oxide, Fe-hydroxide, and Fe-sulphate-hydrate minerals associated with sulphide-bearing mine wastes - Crowley, J.K.; Williams, D.E.; Hammarstrom, J.; Piatak, N.; Chou, I.-M.; Mars, J.C. (Geochemistry: Exploration, Environment, Analysis, 2003)