1. A. Nathansohn, Abhand. Konigl. sachs Gesel. der Wissensch. Leipsig, 39, 3 (1906).
2. C. W. Correns, A. Defant, F. Gessner, W. Stahlberg, V. Schubert, H. Wattenberg and B. Wüst, ” Tiefseebuch” (Berlin, 1934).
3. C. G. Rossby, ” Papers in Physical Oceanography and Meteorology”, 5, No. 1 (1936).
4. H. R. Seiwell, ” Papers in Physical Oceanography and Meteorology”, 3, No. 1 (1934). ibid., 3, No. 4.
5. H. B. Bigelow, ” Papers in Physical Oceanography and Meteorology”, 2, No. 4.