Weaver, Robert J.  1917- <br/><br/>
Plant growth substances in agriculture / 
by Robert J. Weaver. 
 - San Francisco :  W. H. Freeman,  1972. 
 - xviii , 594 p.:  ill.;  24 cm . 
<br/><br/>Bibliography: p. 493-562 and Includes index. 
<br/><br/><label>ISBN: </label>0716708248 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant regulators.<br/>Plant hormones.<br/>Herbicides.