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美国国家农业图书馆1990年编辑出版了《1990年AGRICOLA引用期刊目录》、《AGRICOLA主题类目代码及其适用范围(1990年修订版)》两本AGRICOLA数据库辅助工具书。它们的内容及编排形式如下:
In 1990, the National Library of Agriculture of the United States edited and published two AGRICOLA database aids for compiling and publishing the “Directory of AGRICOLA Citation Index 1990”, “The subject code of AGRICOLA category and its application (1990 revision)”. Their contents and layout are as follows: