Pradit Pongtongkam; Kanchana Klakhaeng; Paderm Ratisoontorn; Saowanee Suputtitada; Surin Peyachoknagul; Nitsri Sangduen; Chairerk Maneepongse; Hathairat Uraivong. Immature Embryo Culture in Hybrid Rice. Agr. Nat. Resour. 1993, 27, 15-19.