Labour Saving Ideas 

 - Food and Agriculture Organization of the United Nations.  Rome  1974 
 -  Fig  
 - Volume  2 .
<br/><br/><label>ISBN: </label>92-5-000969-0 
<br/><br/><label>Nat. Bib. No.: </label>6633 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Management & Public Relations
<br/><br/><label>Universal Decimal Class. No.: </label>650  / LAB