1. Oil and gas investigations, preliminary chart. 34. Lower Tertiary stratigraphy of Mount Diahlo, Marysville Buttes, and west border of lower Central Valley of California [with text]: by Ralph Stewart. n. p. Bookmark Corporate/Agency Authors: Geological Survey and Interior Dept. Publisher: Geological Survey Date: 1949 SuDoc number: I 19.20:Ol 5/6/prelim.chart 34/sh.1-2