21 



10. Milne-Thomson, L.M., "Theoretical Hydrodynamics," Second Edition, The Macmillan 

 Company, New York, N.Y., 1950. 



11. Plesset, M.S. and Shaffer, P.A., "Cavity Drag in Two and Three Dimensions," U.S. 

 Naval Ordnance Test Station Report 131, NavOrd Report 1014. Inyokern, Calif., 6 October 

 1949. 



