found: A reluctant hero, 2011:t.p. (Captain Robert Ryder, VC) p. 1 (Robert Edward Dudley Ryder, born on 16 Feb. 1908) p. 209 (died in 1986)
found: OCLC, 20 Jan. 2023(access: Ryder, R.E.D.; Ryder, R.E.D. Capne de Fregate; Ryder, Robert, 1908-1986; Ryder, Robert Edward Dudley; Ryder, Robert Edward Dudley, 1908; usage: R.E.D. Ryder; Robert Ryder)
found: BL database, 13 Feb. 2012(hdg.: Ryder, Robert, 1908-1986)
found: British Graham Land Expedition (1934-1937). Graham Land Coast, 1938:(from surveys by ... R.E.D. Ryder R.N.)
found: Wikipedia, viewed 20 Jan. 2023(Captain Robert Edward Dudley Ryder; Royal Navy officer from 1926-1950; born 16 Feb. 1908 in India; died at sea off Guernsey on 29 June 1986; member of Parliament from 23 Feb. 1950-6 May 1955) - https://en.wikipedia.org/wiki/Robert_Ryder