TY - Biodiv Sci A1 - XU Song-Ling T1 - Economic approaches to valuing biodiversity: some theoretical barriers and relevant counter measures Y1 - 2001-08-20 JF - Biodiversity Science JO - Biodiv Sci SP - 310 EP - 318 VL - 09 IS - 3 UR - https://www.biodiversity-science.net N1 - 10.17520/biods.2001047 ER -