Encyclopedia Britannica  : the new : macropedia : knowledge in depth 

 - 15. ed. 
 - USA  University of Chicago  1977 
 - vol. 5  28 cm. 
<br/><br/>vol. 5 : Conifer-Ear diseases 
<br/><br/><label>ISBN: </label>0852293151 
<br/><br/><label>Dewey Class. No.: </label>032