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المؤلفون: B. Frank Gray, H.G. Bow, A.P. Burkhart, John Oppie McCall, Cora V. Davisson, A.C. Barclay, O.E.T. Von Der Heyde, C. Willard Camalier, Charles A. Hess, Albert L. Midgley, E.R. Stitt, J.G. Reid, D.M. Gallie, E.W. Elliott, Frank W. Booth, Charles A. Spahn, P.C. Hollis Lapp, Ernest V. Madison
المصدر: The Journal of the American Dental Association (1922). 13:1838-1842