About this article
Published Online: Jan 19, 2024
Page range: 100 - 102
DOI: https://doi.org/10.2478/aoj-1973-0004
© 1973 John M. Grewe et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.
John M. Grewe
Associate Professor and Chairman, Department of Orthodontics, School of Dentistry,
University of MarylandU.S.A.
Terry J. Freer
Senior Lecturer in Orthodontics
University of Queensland Dental School
Robert M. Little
Assistant Professor, Department of Orthodontics,
School of Dentistry, University of MarylandU.S.A.