Search for husband

Please help me to locate my husband and father of our daughter. We own him a debt of gratitude. His name as I known is Mr. Billy C. Ewen. He worked for RMK at Saigon around 1964,1965,1966. I lost contact with him when he left Viet Nam to work in some oil related field. He didn't see the birth of his daughter but we are in constant contact until he had an accident and broke his leg.If you know how to contact him, please let me know. My email is dhdennis@aol.com Thanks Bich.