TY - RPRT TI - Preliminary digital classification map of limonitic rocks, Observation Knoll 7 1/2' quadrangle, Utah AU - M. H. Podwysocki AU - Donald B. Segal PY - 1980 DO - 10.3133/ofr801134 UR - https://pubs.usgs.gov/publication/ofr801134 ID - ofr801134 ER -