by by M.J. Rosenau, W.J. Keegan, Joseph Goldberger, and G.C. Lake ; II. Experiments upon volunteers to determine the cause and mode of spread of influenza, San Francisco, November and December, 1918 / by G.W. McCoy and De Wayne Richey ; III. Experiments upon volunteers to determine the cause and mode of spread of influenza, Boston, February and March, 1919 / by M.J. Rosenau, W.J. Keegan, De Wayne Richey, G.W. McCoy, Joseph Goldberger, J.P. Leake, and G.C. Lake