Need for Several Entries 

A library catalogue can just meet any one type of user's approach like author approach, title approach, etc. We can also prepare catalogues, which can-Meet two or more of these user needs. Say, for example, author and title approach; or title and subject approach and so on. In a Dictionary Catalogue information is provided usually under the three approaches namely; author,' title and subject. Sometimes in addition, series approach may also be provided for. To meet the requirements of each one of these approaches we provide an entry under that particular heading or caption in a .library catalogue. 

Thus, a single book may have to be provided with a minimum of three entries when we wish to help a user find the book under anyone of the possible approaches of author, title, and subject. 

Take for example the following book published by the Jaico Publishing House, Bombay in 1956: 

Example 1  

A user who knows the title will ask for it or search for it in the catalogue under the title Economics in One Lesson. In this case the user may not know the author. But for some other user, the author's name may be familiar. Then he would search for the book under Hazlittor Henry Hazlitt. Yet another user may be the one who is interested in reading books on Economics: ' Here the subject of his interest is Economics and this book is no doubt useful to that user if he is interested in finding popular books on the subject. For this book, therefore, we provide at least three entries under each one of the author, title and the subject.