1977 Herbicide manual for Ag chemical dealers. 

 - Iowa :    Iowa State University,    [1976]. 
 - 40 p. :    ill. ;    29 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Herbicides -- Handbooks, manuals, etc.
<br/><br/><label>Dewey Class. No.: </label>AF PF 623 HER