TY - RPRT TI - Stratigraphy and geologic structure in the Piedra River Canyon, Archuleta County, Colorado AU - C.B. Read AU - G. H. Wood AU - A. A. Wanek AU - Pedro Verastegui Mackee PY - 1949 DO - 10.3133/om96 UR - https://pubs.usgs.gov/publication/om96 ID - om96 ER -