00543nam a2200193Ia 4500 CTU_29015 210402s9999 xx 000 0 und d 630.715 I71t/1990 IRRI Training and technology transfer course Performance objectives manual IRRI Manila IRRI 1990 agriculture - study and teaching Nguyễn Quang Điền, 990310 Trung tâm Học liệu Trường Đại học Cần Thơ