TY - RPRT TI - Stratigraphy of the Lower and Middle(?) Triassic Union Wash Formation, east-central California AU - Paul Stone AU - Calvin H. Stevens AU - M.J. Orchard PY - 1991 DO - 10.3133/b1928 UR - https://pubs.usgs.gov/publication/b1928 ID - b1928 ER -