Elson, R. E. <br/><br/>
The cultivation system and "agricultural involution" / 
by R.E. Elson. 
 - Melbourne :  Depart of History,  Monash University,  1978. 
 - 30 p. : ill., maps. 
 - Centre of Southeast Asian Studies working papers ; no. 14 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Tillage.<br/>Plants, Cultivated.