I'm sure Daniel can confirm or disconfirm:

*Phonemes and orthography in eight marginal languages of Thailand*
by William Allen
Smalley<http://www.amazon.com/exec/obidos/search-handle-url/index=books&field-author-exact=William%20Allen%20Smalley&rank=-relevance%2C%2Bavailability%2C-daterank/104-6066275-2223966>

http://www.amazon.com/Phonemes-orthography-marginal-languages-Thailand/dp/B0006DYYCG/sr=1-7/qid=1161816516/ref=sr_1_7/104-6066275-2223966?ie=UTF8&s=books


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