TY - BOOK AU - Kahn,James R. TI - The Economic approach to environmental and natural resources SN - 0030245117 U1 - 333.7 23 PY - 1998/// CY - Fort Worth PB - The Dryden Press KW - Environmental economics KW - Natural resources KW - Kinh tế KW - Môi trường KW - Tài nguyên thiên nhiên ER -