1. 1 Introduction
1.2 information resources and their types
Chapter II Basis of Information Retrieval
2. 1 information retrieval principle
2.2 Information retrieval system
2.3 Information retrieval methods
Chapter III Common Reference Books
3. 1 Overview of reference books
3.2 Find reference books
3.3 reference books
Chapter 4 Large-scale Integrated Retrieval System at Home and Abroad
4. 1 China hownet digital library
4.2 superstar reading show knowledge base
43,000 square meters data resource system