International bibliography on cropping systems 1978 
/ International Rice Research Institute 
 - Philippines:   International Rice Research Institute,      1980 
 - 239p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Language
<br/><br/><label>Subjects--Index Terms: </label>Bibliography 
<br/><br/><label>Universal Decimal Class. No.: </label>R 016:631/635  / L8