Prytherch, Ray <br/><br/>
Sources of Information in Librarianship and Information Science 
/ by Ray Prytherch 
 - 2nd ed. 
 - USA;  Gower Publishing Company:  1987. 
 - 153p. 
<br/><br/><label>ISBN: </label>0566055090 
<br/><br/><label>Dewey Class. No.: </label>020  / PRY/S