DJVU PDF Diller, A.V.N. 1991, "Consonant mergers and Inscription One", in The Ram Khamhaeng Controversy, ed. J.R. Chamberlain, pp. 161-192. The Siam Society. cite.

DJVU PDF Gedney, W.J. 1991, "Comments on linguistic arguments relating to Inscription One", in The Ram Khamhaeng Controversy, ed. J.R. Chamberlain, pp. 193-226. The Siam Society. cite.

DJVU PDF Chamberlain, J..R. 1991, "The efficacy of the P/PH distinction for Tai Languages", in The Ram Khamhaeng Controversy, ed. J.R. Chamberlain, pp. 453-486. The Siam Society. cite.

DJVU PDF Diller, A.V.N. 1991, "Consonant mergers - a closer look", in The Ram Khamhaeng Controversy, ed. J.R. Chamberlain, pp. 487-512. The Siam Society. cite.