TY - RPRT TI - Invertebrate Paleontology of the Wilson Grove Formation (Late Miocene to Late Pliocene), Sonoma and Marin Counties, California, with some Observations on Its Stratigraphy, Thickness, and Structure AU - Charles L. Powell AU - James R. Allen AU - Peter J. Holland PY - 2004 DO - 10.3133/ofr20041017 UR - https://pubs.usgs.gov/publication/ofr20041017 ID - ofr20041017 ER -