Everson, L. E. <br/><br/>
The Effect of 2,4-dichlorophenoxyacetic  Acid on Certain Weed and Crop Seeds 

 -  University of Minnesota,   1951. 
 - 24 p. :   il. ;   21 cm. 
 - Univ. of Minnesota. Agricultural Experiment Station. Technical Bulletin ;   197 .