00511nam a2200193Ia 4500 CTU_93176 210402s9999 xx 000 0 und d 8000 500 B617 Birch, Beverley Guglielmo marconi Beverley Birch Thành phố Hồ Chí Minh Văn Nghệ 2001 Science,Knowledge Tuyến,Hải Trung tâm Học liệu Trường Đại học Cần Thơ