Vien, Nguyen Khac., ed.
Agricultural problems (3): some techniclal aspects - [S.l] [s.n] 1971 - 286 p.- - Vietnamese studies; no. 27 .
247115
History-Vietname
959.7 / AGI
Agricultural problems (3): some techniclal aspects - [S.l] [s.n] 1971 - 286 p.- - Vietnamese studies; no. 27 .
247115
History-Vietname
959.7 / AGI