Root growth :  proceedings of the Fifteenth Easter School in Agricultural Science, University of Nottingham, 1968. / 
edited by W.J. Whittingham. 
 - London :  Butterworths,  [1969] 
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Roots (Botany) -- Congresses.--Roots (Botany) -- Congresses.