Singh, Gurudev <br/><br/>
Information Sources, Services, and Systems 

 - Delhi:  PHI Private Limited,  2013. 
 - xviii, 517p. 
<br/><br/>1. Information Source<br/>2. Kinds of Reference Books and Their Evaluation<br/>3.Dictionaries<br/>4.Encyclopaedias<br/>5. Statistical Sources<br/>6. Patents and Standards 
<br/><br/><label>ISBN: </label>9788120346390 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library Science--Information Sources, Services
<br/><br/><label>Dewey Class. No.: </label>025.17  / SIN/I