00619nam a2200193Ia 4500 CTU_127160 210402s9999 xx 000 0 und d 330.9 S797 State of the world 1999 : a worldwatch Institute report on progress toward a sustainable society Lester R. Brown ... [et al.] New York Norton 1999 Economic policy,Population policy,Environmental policy Periodicals,Periodicals,Periodicals Hiếu Trung tâm Học liệu Trường Đại học Cần Thơ