00738nam a2200193Ia 4500 CTU_123002 210402s9999 xx 000 0 und d 338.162 Ngh305 Nghiên cứu hệ thống canh tác Việt Nam : Tài liệu hội nghị mạng lưới hệ thống canh tác Việt Nam- Lần thứ 3- 27-29 tháng 11 năm 1992 Thái Nguyên, Bắc Thái Cần Thơ Trường Đại học Cần Thơ 1993 Farming systems,Agriculture Economic aspects Vietnam M.Loan, Huỳnh Mai Trung tâm Học liệu Trường Đại học Cần Thơ