TY - RPRT TI - Photogeologic and reconnaissance geologic map of the Knowlton Quadrangle, Custer County, Montana AU - S. J. Luft AU - R. B. Colton AU - E.L. Heffern PY - 1984 DO - 10.3133/mf1697 UR - https://pubs.usgs.gov/publication/mf1697 ID - mf1697 ER -