TY - RPRT TI - Spectral variations in rocks and soils containing ferric iron hydroxide and(or) sulfate minerals as seen by AVIRIS and laboratory spectroscopy AU - Barnaby W. Rockwell PY - 2004 DO - 10.3133/ofr20041431 UR - https://pubs.usgs.gov/publication/ofr20041431 ID - ofr20041431 ER -