Ritson, Christopher. <br/><br/>
Agricultural economics :  principles and policy / 
Christopher Ritson. 
 - London :  Staples,  c1977. 
 - xiii, 409 p. :  ill. 
<br/><br/><label>ISBN: </label>0258969385 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture and state.<br/>Agriculture--Economic aspects.