Chemical analyses, correlations, and ages of upper Pliocene and Pleistocene ash layers of east-central and southern California / by A.M. Sarna-Wojcicki ... [et al.] (Geological Survey professional paper ; 1293)
Chemical analyses, correlations, and ages of upper Pliocene and Pleistocene ash layers of east-central and southern California / by A.M. Sarna-Wojcicki ... [et al.]