Elson, R. E.  1947- <br/><br/>
The cultivation system and "agricultural innovation" / 
by R. E. Elson 
 - Monash University, Australia :  Department of History,  1978 
 - 30 p. :  ill. ;  30 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture--Economic aspects