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2. The problem of cerebral palsy;Levin;N.Y. State J. Med.,1949
3. Handicapped children in Georgia, a study of prevalence, disability and resources;Wishik;Am. J. Public Health,1956
4. Terminology and classification of cerebral palsy;Bax;Dev. Med. Child Neurol.,1964
5. A classification of cerebral palsy;Minear;Pediatrics,1956