Udomluk Suwanvecho. (1997) Behavioral study of maturation of white-handed gibbons(Hylobates lar) at Khao Yai National Park, Thailand. Mahidol University,:ม.ป.ท.Udomluk Suwanvecho. 1997. Behavioral study of maturation of white-handed gibbons(Hylobates lar) at Khao Yai National Park, Thailand. ม.ป.ท.:Mahidol University,;Udomluk Suwanvecho. Behavioral study of maturation of white-handed gibbons(Hylobates lar) at Khao Yai National Park, Thailand. ม.ป.ท.:Mahidol University, 1997. Print.