D. R. Askren

Petrogenesis of Tertiary Andesite Lava Flows Interlayered with Large-Volume Felsic Ash-Flow Tuffs of the Western USA

M. Roden, J. Whitney, D. R. Askren, 1997 .

Petrology and geochemistry of the Huerto Andesite, San Juan volcanic field, Colorado

M. Roden, D. R. Askren, James A. Wjitney, 1991 .