1. Neurologic manifestations of rheumatoid arthritis, 1972;Aita;Nebraska Med. J.,1972
2. Rheumatoid arthritis of the cervical spine;Ball,1971
3. Polymyositis;Barwick;Am. J. Med.,1963
4. The Frequency of the Rheumatic Diseases;Cobb,1971
5. Rheumatoid arthritis of the cervical spine. An analysis of 333 cases;Conlon;Ann. Rheum. Dis.,1966