著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL Symposium on Research into Agro-technical Methods Aiming at Increasing the Productivity of Crops--Co-efficients for the Most Efficient Use of Fertilizer Nutrients and Means for Reducing the Losses of Nutrients to the Environment under the Conditions of I and United Nations. Economic Commission for Europe. Agriculture Section and United Nations. Economic Commission for Europe,Efficient use of fertilizers in agriculture,,"Martinus Nijhoff/Dr. W. Junk for the United Nations,Distributors for the United States and Canada, Kluwer Boston",1983,Developments in plant and soil sciences,,9024728665,,https://cir.nii.ac.jp/crid/1130000797325174784