Sakhong, D., Vongpralub, T., Katawatin, S. and Sirisathien, S. 2013. Ultrasound-guided Transvaginal Follicular Aspiration and Development of Vitrified-thawed Thai Indigenous Beef Cattle (Bos indicus) Oocytes after in vitro Fertilization. The Thai Journal of Veterinary Medicine. 42, 4 (Aug. 2013), 509–516.