Katz, William A., <br/><br/>
Introduction to reference work / 

 - 7th ed. 
 - New York   McGraw-Hill,  1997. 
 - xv, 286p. :   24 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/>v. 1. Basic information sources -- v. 2. Reference services and reference processes. 
<br/><br/><label>ISBN: </label>0070342776  0070342784 
<br/><br/><label>LC Class. No.: </label>Z711  / .K181 1997