Food And Agriculture Organisation Of The United Nations <br/><br/>
Manual On The Employment Of Draught Animals In Agriculture 

 -  Rome : Fao 1972. 
 - 249 
 - Fao Agricultural Services Bulletin No. 51 .
<br/><br/><br/>Eng 
<br/><br/><label>ISBN: </label>9251004587 (Pbk)