00719nam a2200193Ia 4500 CTU_141970 210402s9999 xx 000 0 und d 333.73 R158 Raintree, John B. Marketing research for conservaation and development John B. Raintree, Le Thi Phi, Nguyen Van Duong Hà Nội [Hà Nội] 2002 Introduction to study case studies; MA&D case study of villages in the Buffer Zone of Ba Be National park; guidelines for monitoring. Nature conservation,Tài nguyên thiên nhiên Tuyến Trung tâm Học liệu Trường Đại học Cần Thơ