Corn drills 

 - London :  H.M.S.O.,  1968 
 - 6 p. 
 - Mechanization leaflet ;  no. 22 .
 - Great Britain.  Ministry of Agriculture, Fisheries and Food.  Mechanization leaflet ;  no. 22 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Drill (Agricultural implement)<br/>Corn planters (Machines)