各期《AGRINDEX》均包括导言、主要著录(Main Entry Section)、索引(Index)和附录四大部分。一、导言简介“AGRIS”的由来、宗旨、发展及《AGRINDEX》的内容、结构和使用要点。二、主要著录主要著录是《AGRINDEX》的正文和主体,它将所收录的文献目录据其内容,按专业分类主题编排。以1986年的《AGRIN-DEX》为例,共有17个一级专业分类,它们以英文字母标识的一级专业分类代号及所表示的内容如下: Each issue of “AGRINDEX” includes the Introduction, Main Entry Section, Index and most of Appendix IV. I. INTRODUCTION INTRODUCTION The origin, purpose, development of “AGRIS” and the content, structure and use of “AGRINDEX”. Second, the main bibliography The main bibliography is “AGRINDEX” the main body, it will be included in the bibliography according to its content, according to the professional classification of thematic arrangement. Taking 1986 “AGRIN-DEX” as an example, there are 17 first-level professional categories whose first-level professional codes and their contents are as follows: