Looking for Baptist Missionary in Dalat in the 60s and 70s

A friend of mine, a Lat Montagnard in the Central Highlands, is looking for an American Baptist missionary by the name of Jone, or John or Jones Myler, who worked as a missionary in Dalat during the 60s and 70s. He worked with two other missionaries: Mr. Thenel and Mr. Bing. Mr. Myler adopted a Montagnard boy by the name of Lomu Ha Krieng, born 1956 in R'Chai, Duc Trong District, Lam Dong Province. Mr. Myler moved eventually to Saigon and after the fall returned to the U.S., possibly Colorado, together with Lomu Ha Krieng. Is there anyone who can give me information on Mr. Myler's whereabouts? Does anybody know Mr. Lomu Ha Krieng? I appreciate any input. Thank you.