LATE TERTIARY AND QUATERNARY ELPHIDIUMS OF THE WEST COAST OF NORTH AMERICA. TRANSACTIONS OF THE SAN DIEGO SOCIETY OF NATURAL HISTORY, VOLUME V, NO. 6, JULY 28, 1927
San Diego, CA: San Diego Society of Natural History, 1927. Soft cover. Pages 69 through 82 with two plates. A very good plus copy. More