DJVU PDF Vickery, M. 1991, "The Ram Khamhaeng inscription: a Piltdown skull of Southeast Asian history?", in The Ram Khamhaeng Controversy, ed. J.R. Chamberlain, pp. 3-52. The Siam Society. cite.

DJVU PDF Vickery, M. 1991, "Piltdown skull: installment 2", in The Ram Khamhaeng Controversy, ed. J.R. Chamberlain, pp. 333-418. The Siam Society. cite.