00559nam a2200193Ia 4500 CTU_92406 210402s9999 xx 000 0 und d 17700 628.1 Qu609 Nguyen, Xuan Quynh Biological surveillance of fresh waters Nguyen Xuan Quynh, Mai Dinh Yen Hà Nội Quốc gia Hà Nội 2004 Water quality biological assessment Tuyến Trung tâm Học liệu Trường Đại học Cần Thơ