H.I. Oka Origin of cultivated rice - Tokyo Japan scientific society press 1988 - 254p H.I. Oka: Origin of cultivated rice. Tokyo. Japan scientific society press, 1988. 4-7622-1544-9--(633.18OKA) ENGLISH ISBN: 4-7622-1544-9 Dewey Class. No.: 633.18 / OKA