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3. Discussion of report: a review of orthodontic research;Korkhaus;Int Dent J,1953
4. La disjunctions de la suture palatine mediane;Derichsweiler;Trans Eur Orthod Soc,1953
5. The apical base after rapid spreading of the maxillary bones;Gerlach;Eur Orthod Soc Rep,1956