R. D. Walker
- Underdrainage and its Application to Railway Work. Dans: Minutes of the Proceedings of the Institution of Civil Engineers, v. 218, n. 1924-2 ( 1924). (1924):
- The Causes and Prevention of Defective Track on Tropical Railways. Dans: Minutes of the Proceedings of the Institution of Civil Engineers, v. 214, n. 1922-2 ( 1922). (1922):