摘要
At head of title: International Geological Congress, XVI session, United States, 1933. Guidebook 4: Excursion A-4.;Contains contributions by D.H. Newland, Winifred Goldring, O.D. von Engeln, C.A. Hartnagel, J.T. Sanford, F.B. Taylor, H.L. Alling, J.E. Hoffmeister, Rudolf Ruedemann.