Zugravescu . Ion  Petrovanu . Magda <br/><br/>
N - Ylid Chemistry 

 - New York  McGraw-Hill International Book Company  1976 
 - 396 p. 
<br/><br/><label>ISBN: </label>0-07-073080-6 
<br/><br/><label>Dewey Class. No.: </label>540  / ZUG