Harper, F. <br/><br/>
Principles of arable crop production 

 - London :  Granada,  1983 
 - 336 p. 
<br/><br/> 37-8 
<br/><br/><label>LCCN: </label>537 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cultivos.<br/>Cultivos--Rendimiento.
<br/><br/><label>Dewey Class. No.: </label>633  / H37