00624nam a2200181Ia 4500 CTU_6161 210402s9999 xx 000 0 und d 372.7 H561/L9 Trần Quốc Dương Hướng dẫn giảng dạy vật lí lớp 9 phổ thông Trần Quốc Dương, Nguyễn Đức Thâm Hà Nội Giáo dục 1972 physics - study and teaching ( elementary ) Nguyễn Quang Điền, 960813 Trung tâm Học liệu Trường Đại học Cần Thơ