00659nam a2200181Ia 4500 CTU_1141 210402s9999 xx 000 0 und d 511.3 Ch513 Hoàng Chúng Giáo trình khái niệm tập hợp, logic; phương pháp thống kê Dùng trong các trường sư phạm cấp I, hệ 10+2 và 12+1 Hoàng Chúng, Lê Ngọc Anh Hà Nội Giáo dục 1977 ensembles ( mathematics ),logic, symbolic and mathematical Trung tâm Học liệu Trường Đại học Cần Thơ