Nievergelt, B. <br/><br/>
Ibexes in an African Environment:  Ecology and Social System of the walia Ibex in the Simen Mountains, Ethiopia 
/ by B. Nievergelt 
 - Berlin, Heidelberg:  Springer-Verlag,  1981. 
 - ix, 189p. 
<br/><br/><label>ISBN: </label>3540105921 
<br/><br/><label>Dewey Class. No.: </label>599.7358  / NIE/I