Callahan, Mike <br/><br/>
Dr. File finder's guide to shareware 

 - New York  McGraw - Hill  1990 
 - xxxi,1019p.  23cm 
<br/><br/><label>ISBN: </label>0078816467 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Programs
<br/><br/><label>Dewey Class. No.: </label>005.3  / CAL