The ABC of copyright. 

 - Paris :  Unesco,  1981. 
<br/><br/><label>ISBN: </label>9231018892 (pbk.) 
<br/><br/><label>LCCN: </label>82136492 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Copyright.
<br/><br/><label>LC Class. No.: </label>Z551  / .A23 
<br/><br/><label>Dewey Class. No.: </label>025.5/23