The plant :    the living plant :    the root. 

 - Rome :    Food and Agriculture Organisation of the United Nations,    1976. 
 - 29 p. :    ill. ;    21 cm. 
 - Better farming series ;    no. 1 .
<br/><br/><label>ISBN: </label>9251001405 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Plants.<br/> Plant physiology.