Manonai, J., Jirapinyo, M., Theppisai, U., Suchartwatnachai, C., Thanuntasath, C. and Preutthipun, S. 1999. Endometriosis in Infertile Women at Ramathibodi Hospital. Thai Journal of Obstetrics and Gynaecology. 11, 4 (Oct. 1999), 223.