Retrieved 2016-04-25. 1 2 3 4 Beckett (2007), pp 394–395 1 2 3 4 Beckett (2007), pp 341–343 1 2 3 4 5 6 7 8 Beckett (2007), pp 455–460 ↑ Braybon (1990) ↑ Braybon (2005) 1 2 3 4 5 The War Office (1992), p. 339 1 2 3 Mitchell (1931), p 12 1 2 3 4 Beckett (2007), p 564 1 2 3 Pierce (1992), p 5 ↑ Adrian Gregory (2008).