author, Arnold Weisgold ; senior editor, D. Walter Cohen ; sponsored by the University of Pennsylvania, School of Dental Medicine ; [illustrations by Elissa Berardi] ; [photographic reproductions by David Sullivan]Quintessence1981
author, J. George Coslet ; senior editor, D. Walter Cohen ; sponsored by the University of Pennsylvania, School of Dental Medicine ; [illustrations by Elissa Berardi] ; [photographic reproductions by David Sullivan]Quintessence1980