6Lambert D,Schaible G D,Johansson R,et al.The val-ue of integrated CEAP-ARMS survey data in conserva-tion program analysis [J].Journal of Soil and Water Conservation,2007,62(1):1-10.
7Hansen L,Ribaudo M.Economic Measures of Soil Conservation Benefits:Regional Values for Policy As-sessment [R].Washington D.C.,US:US Department of Agriculture,2008:1-25.