1. Begg orthodontic theory and technique;Begg,1971
2. Begg orthodontic theory and technique;Begg,1971
3. Begg orthodontic theory and technique;Begg,1971
4. The origin and progress of the light wire differential force technique;Begg;Begg J. Orthod.,1968
5. Differential force in orthodontic treatment;Begg;Am. J. Orthod.,1956