Kool Rudolf <br/><br/>
Tropical agriculture and economic development 

 -  1960 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic Condition International
<br/><br/><label>Dewey Class. No.: </label>X.18.N5, K0