TY - RPRT TI - Preliminary digital classification of limonitic rocks, Frisco 15-minute Quadrangle, Utah AU - M. H. Podwysocki AU - D. B. Segal PY - 1980 DO - 10.3133/ofr8019 UR - https://pubs.usgs.gov/publication/ofr8019 ID - ofr8019 ER -