TY - RPRT TI - Eocene and Oligocene planktonic Foraminifera from the upper Butano Sandstone and type San Lorenzo Formation, Santa Cruz Mountains, California AU - R.Z. Poore AU - E. E. Brabb PY - 1977 DO - 10.2113/gsjfr.7.4.249 UR - https://pubs.usgs.gov/publication/70197588 ID - 70197588 ER -