A detailed analysis of the complex process of providing subject access in online catalogues. The text examines the interaction of the several necessary components, such as the catalogue database, users, hardware and software, and search and retrieval software.
![Subject Headings Used in the Dictionary Catalogs of the Library of Congress [from 1897 Through June 1964]](https://books.google.com/books/content/images/frontcover/Z_vmQ3z0sb4C)
![Subject Headings Used in the Dictionary Catalogs of the Library of Congress [from 1897 Through June 1964]](https://books.google.com/books/content/images/frontcover/e-PfvWvc_eAC)
