References
- James W. V., Orr J. F. Surgeon Kirk, Mr. Pringle and the ‘P & K’ Arm. Ulster Med. J. 1983; 52: 107–112
- Patent Numbers. 114,220, 1918, 118,381 (1919), 193,977 (1923). Improvements related to artificial hands. H. D. Fitzpatrick and Co., Chartered Patent Agents, 94 Hope Street, Glasgow and 49 Scottish Provident Buildings, Belfast.
- Patent Numbers. 150,901, 1920, 184,571(1922). Improvements relating to artificial limbs. H. D. Fitzpatrick, Chartered Patent Agents, 94 Hope Street, Glasgow and 49 Scottish Provident Buildings, Belfast.
- Radcliffe C. W. Prosthetic knee mechanisms for above-knee amputees. Prosthetic and orthotic practice, G. Murdoch. Edward Arnold, London 1970