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المؤلفون: A.P. Burkhart, R.S. Hopkins, F.K. Heazelton, H.C. Pollock, A.B. Walker, Albert E. Converse, Elbert Stewart, J.N. Carriere, H.C. McKittrick, John C. Forsyth, Gretchen Goldsmith, Alex Kronmeyer, Walter H. Ellis
المصدر: The Journal of the American Dental Association (1922). 11:184-192