我国学者历来重视资料,但不大重视索引,不知为什么。类书很发达,但目的不是只为查找资料方便。清代的《佩文韵府》按韵排,《古今图书集成》万卷分类排,都不便查考。索引是现代化工具,外国学术书大都附有索引,对中国古书也作索引。美国的哈佛燕京学社编了不少中国古书索引,叫作“引得”。日本人也给中国书 Chinese scholars have always attached importance to information, but do not attach great importance to the index, I do not know why. Class books are developed, but not for the convenience of finding information. Qing Dynasty’s “Pei Wen Yun House” by rhyme row, “ancient and modern book integration” million roll classification row, are inconvenient to check. Index is a modern tool, most foreign academic books are indexed, and ancient Chinese books are also indexed. The United States Harvard Yenching Society compiled a lot of Chinese ancient book index, called “cited.” Japanese also give Chinese book