Basic principles of orthodontia
By: by A. LeRoy Johnson
Published: 1923
Language: eng
Number of pages: 81
Copyright date: 1923
Subjects: Orthodontics
Notes: "Series of lectures delivered before a conference of teachers of orthodontia, February 12 to 16, 1923, at the Thomas W. Evans museum and dental institute, School of dentistry, University of Pennsylvania".

"Reprinted from the Dental cosmos, vol. LXV 1923".