International bibliography on cropping systems, 1975 / 
compiled by Mila Medina Ramos. 
 - Manila :  International Rice Research Institute,  1977. 
 - xxi, 195 p. ;  28 cm. 
<br/><br/> Supplement to International bibliography on cropping systems, 1973-1974.  Includes indexes. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cropping systems--Bibliography.
<br/><br/><label>Dewey Class. No.: </label>016.63158  / INT 1977