The origin and developmen​t of /kra-/ and /ka-/ words in Siamese Thai [-48% were borrowed from Khmer words?]

Siri-Aksornsat, P. (1996), "The origin and development of /kra-/ and /ka-/ words in Siamese Thai", in The Fourth International Symposium on Language and Linguistics, Thailand Institute of Language and Culture for Rural Development, Mahidol University.

http://www.box.net/shared/nbi8utopzkdprpdpbk96