Know your tractor :  a Shell guide / 
por Shell. 
 - London :  The Shell Petroleum Company Limited,  1955. 
 - 362 p. ;  18x23 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Maquinaria agrícola<br/>Tractores
<br/><br/><label>Universal Decimal Class. No.: </label>631.3