Sykes, P. M. (1 April 1940). "Obituary". Journal of the Royal Central Asian Society. 27 (2): 246–252. doi:10.1080/03068374008730964. ISSN0035-8789.(subscription required)
Sykes, P. M. (1 April 1940). "Obituary". Journal of the Royal Central Asian Society. 27 (2): 246–252. doi:10.1080/03068374008730964. ISSN0035-8789.(subscription required)