Christiansson, Carl <br/><br/>
History, society and local production system  crucial variables in modern soil conservation work 
Carl Christiansson 
 - Stockholm  Stockholm University  1992 
 - 11p.  ill  30cm. 
 - Paper; 19 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil conservation
<br/><br/><label>LC Class. No.: </label>IRA S623.C58