Notes on the Age of the Continental Triassic Beds in North America with Remarks on Some Fossil Vertebrates.
Washington: GPO, 1926. 8vo. 10 pp. Stamps near top edge of front cover. No. 2644 from the proceedings of the United States National Museum Vol. 69, Art. 18, pp. 1-10. Near Fine Booklet (Item ID: 48768)