00571nam a2200193Ia 4500 CTU_59982 210402s9999 xx 000 0 und d 32600 621.38897 Tr100 Nguyễn Thanh Trà Kỹ thuật audio - video Nguyễn Thanh Trà và Thái Vĩnh Hiển H. Giáo dục 2003 audiovisual engineering,electronic apparatus and appliances Minh Trung tâm Học liệu Trường Đại học Cần Thơ