MANAGENT OF VERTISOLS IN SUB SAHRAN AFRICA 

 - ADDIS ABABA  ETHIOPIA  1988 
 - xiii/435 
<br/><br/><label>LC Class. No.: </label>631.4306/MAN  / 3 
<br/><br/><label>Dewey Class. No.: </label>631.4306/MAN  / 3