Henry, W.M. <br/><br/>
Online Searching  : An Introduction 
/ by W.M. Henry 
 - London;  Butterworth Scientific:  1980. 
 - 209p. 
<br/><br/><label>ISBN: </label>0408106964 
<br/><br/><label>Dewey Class. No.: </label>029.7  / HEN/O