Knight, B. E. A. <br/><br/>
Studies on plant growth-regulating substances  :   the plant growth -retarding properties of certain ammonium, phosphonium and sulphonium h alides  /  
B. E. A. Knight, H. F. Taylor and R. L. Wain. 
 - Kent :   Wye College,   [n.d]. 
 - v.  :    ill. ;    26 cm. 
 - Reprint No. 419   .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Growth regulators--Regulators------<br/>Growth (Plants) --Regulators------