Martin, John H.  x <br/><br/>
Principles of field crip production.  x 

 - x 
 - N.Y.  Macmillan  1967 
 - ix, 1044p 
<br/><br/>
<br/><br/><label>ISBN: </label>x     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture Botany, Economic 
<br/><br/><label>Dewey Class. No.: </label>633/MAP