The ecology of survival :  case studies from Northeast African His tory / 
edited by Douglas H. Johnson and David M. Anderson 
 - London :  Lester Crook Academic Publishing ,  1987 
 - xii, 339 p. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology--Africa
<br/><br/><label>Dewey Class. No.: </label>307.72