OECD standard codes for the official testing of agricultural and forestry tractors:  codes VI and VII and the amendments to codes I, II, III, IV as published in the 1988 edition 

 - Paris :  [Washington, D.C. :  Organisation for Economic Co-operation and Development ;  OECD Publications and Information Centre, distributor],  1991. 
 - 108 p. :  ill. ;  23 cm. 
<br/><br/> Previous ed. published under title: O.E.C.D. standard code for the official testing of agricultural tractors. 1970. 
<br/><br/><label>ISBN: </label>Hadiah