This paper introduces the preparing work and methods of the establishment of the database of western language books with back tracking method,and probes into the problems in and countermeasures for the establishment of the database with back tracking method.

On controlling the data quality in the retrospective cataloguing of western-language books;

This paper discusses reprinting western-language books literature character,rules of selection,information sources,language and character,methods in cataloguing of western language books,thereby opens out content of literature better,and provides more services to readers.

The Main Access Points of Western Language Books and MARC21;

Online acquisition of Western language books in college and university libraries in the e-commerce environment;

Since the year of 2007,authorized facsimile reprint of western language books and western books written by Chinese have been in Western Language Catalog-Database in the library of China University of Mining and Technology.

This paper analyzed the subject structure and users utilization of foreign language books in the National Agricultural Library,made certain the characteristics of subject structure of the collection and document utilization in order to get some guidelines for the better constructions of foreign language books in the library.

The paper has introduced and analyzed the subject distribution,type distribution and fund distribution of foreign language books in the National Agricultural Library,so as to realize the bibliographic value of foreign language books.

This paper analyzes on the functions and connotations of the unified title in cataloging of western books,and gives a more detailed statement on selecting and heading the unified title,and introduces the principle of making concrete normalization of the unified title and useful fields of MARC format.

Catalog databases for western books are the important parts of the catalog databases in libraries.