TY - RPRT TI - Photogeologic maps of the Bluff 1, 8, and 13 quadrangles, San Juan County, Utah AU - Robert J. Hackman AU - Richard G. Ray PY - 1952 DO - 10.3133/ofr5266 UR - https://pubs.usgs.gov/publication/ofr5266 ID - ofr5266 ER -