1Lecturer, Division of Continuing Education, University of Pittsburgh School of Dental Medicine, Pittsburgh, Pennsylvania
2Private Practice, Fanwood, New Jersey
3Private Practice, Metuchen, New Jersey
Tài liệu tham khảo
Bregstein, 1959
Hollander, 1967
Morrison, G. A.: In the Dentist's Office. Philadelphia, J. B. Lippincott Co., 1959.
Wirth, F. H.: Personal communications.