Zimmermann, M. H <br/><br/>
Transport in plants I  phloem transport 

 - Springer-verlag berlin heidelberg, New York  1975 
 - xvii,535 
<br/><br/><label>ISBN: </label>3-540-07314-0 
<br/><br/><label>Dewey Class. No.: </label>581.1 Zim