Jackson, Robert Tracy 1861-1948 creator text xx Washington Govt. print. off. 1918 monographic eng

print

103-116 p. illus. 25 cm. By Robert Tracy Jackson. At head of title: Contributions to the geology and paleontology of the Canal Zone, Panama, and geologically related areas in Central America and the West Indies. "Extract from Bulletin 103, pages 103-116, with plates 46-52." Stamped on t.-p.: Issued Feb. 19, 1919. "Essentially a reprint of my paper bearing the same title published in the Proceedings of the United States National museum, volume 53, pages 489-501 ... September 24, 1917."--Introd. Sea urchins, Fossil Paleontology Panama Paleontology Costa Rica Q11 .U6 no. 163, pt. 5 United States National Museum. s 21000005 DLC 751117 20260227111911.0 s 21000005