Ritson, Christopher. <br/><br/>
Agricultural economics :  principles and policy / 
Christopher Ritson. 
 - London :  Collins,  [1977] 
<br/><br/>Bibliography. 
<br/><br/><label>ISBN: </label> L.12.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture -- Economic aspects.--Agriculture -- Economic aspects.