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2. 2. Chaplin, H. R. , “Theory of the Annular Nozzle in Proximity to the Ground”, Naval Ship Research and Development Center Report 1373 (Aero 923), July 1957.
3. 3. Chaplin, H. R. & Ford, A. , “Some Design Principles of Ground Effect Machines”, Naval Ship Research and Development Center Report 2121, April 1966.
4. 4. Kaario, T. J. , “The Principles of Ground Effect Vehicles”, presented at Princeton University Symposium on Ground Effect Phenomena, October 1959.
5. An Introduction to the General Principles of Hovercraft;Cockerell;Hovering Craft and Hydrofoil,1964