W. R. Gherardi Oceanographic Work of the Hydrographic Office and the United States Navy during the year 1932 PDF
S. Kisindo Methods of Ocean Current Observations now used by the Hydrographic Department, Tokyo, and some results obtained to date PDF
Willis Ray Gregg History of the application of Meteorology to Aeronautics with special reference to the United States PDF
J. D. Nares A method of obtaining Current Observations from a ship in deep water without anchoring PDF