Plant growth substances / 
Edited by Folke Skoog 
 - America :  University of wisconsin press,  c1951 
 - xvii, 476 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants
<br/><br/><label>Dewey Class. No.: </label>580  / PLA 1951