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2. Mongolism: A clinicogenealogical investigation comprising 526 mongols living on Seeland and neighboring islands in Denmark;Oster,1953
3. Biology of mental defect;Penrose,1963
4. Coordinate analysis applied to orthodontic studies;Cleall;Angle Orthod.,1971
5. An analysis of serial models between three and eight years of age;Clinch;Dent. Rec.,1951