1. A clinical and genetic study of 1280 cases of mental defect;Penrose,1938
2. Investigation of families with two or more mentally defective siblings: clinical observations;Wright;Am J Dis Child,1959
3. An approach to genetic factors in mental retardation. Studies of families containing at least two siblings admitted to a state institution for the retarded;Priest;Am J Ment Defic,1961
4. A pedigree of mental defect showing sex-linkage;Martin;J Neurol Neurosurg Psychiatry,1943
5. Some examples of the inheritance of mental deficiency: apparently sex-linked idiocy and microcephaly;Allan;Am J Ment Defic,1944