Folley, R. R. W. <br/><br/>
Intensive crop economics / 
R.R.W. Folley. 
 - London :  Heinemann Educational Books,  c1973. 
 - ix, 331 p. : ill 
<br/><br/><label>ISBN: </label>0435629913 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture--Economic aspects.<br/>Crops--Economic aspects.