Virmani, S. S. Heterosis and hybrid rice breeding / S. S. Virmani - Manila : International Rice Research Institute (IRRI) , 1994 - 189p. : ill. ; 23 cm. Includes bibliographical references. ISBN: 3540582061 0387582061 Subjects--Topical Terms: RiceGeneticsSeeds Gov. Doc. Class. No.: XZ IRRI Het