TY - RPRT TI - Maps showing percent of sandstone and total thickness of sandstone in the Westwater Canyon and Brushy Basin Members of the Morrison Formation, San Juan Basin, New Mexico AU - A. R. Kirk AU - S. M. Condon PY - 1989 DO - 10.3133/i1957b UR - https://pubs.usgs.gov/publication/i1957B ID - i1957B ER -