00782nam a2200205Ia 4500 CTU_113916 210402s9999 xx 000 0 und d 631.0984 K42 Kessler, Aad Moving people - towards collective action in soil and water conservation : Experiences from the Bolivian mountain valleys Aad Kessler Wageningen, The Netherlands Wageningen University and Research Centre, Department of Environmental Sciences, Erosion and Soil & Water Conservation Group 2006 Agroforestry systems,Soil conservation,Water conservation Bolivia,Bolivia,Bolivia Minh Trung tâm Học liệu Trường Đại học Cần Thơ