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المؤلفون: F.F. Perry, M.F. Jarrell, A.E. Boice, James B. Jones, Frank B. Hower, W.E. Hocking, J.W. Crawford, E.C. Andrew, Juliette A. Southard, Ruth F. Rogers, Charles W. Young, John C. Forsyth, Gladys I. Shaeffer, O.H. McCarty, P.G. Spencer, George F. Sauer
المصدر: The Journal of the American Dental Association (1922). 15:594-598