@book{ BA38210145, author = "Symposium of the International Association of Agricultural Economists and Wossink, G. A. A. and Van Kooten, G. C. (Gerrit C.) and Peters, G. H.", title = "Economics of agro-chemicals : an international overview of use patterns, technical and institutional determinants, policies and perspectives : selected papers of the Symposium of the International Association of Agricultural Economists held at Wageningen, The Netherlands, 24-8 April 1996", publisher = "Ashgate", year = "1998", URL = "https://ci.nii.ac.jp/ncid/BA38210145" }