Nievergelt, . Ibexes in an African Environment: Ecology and Social System ofd the Walia Ibex in the Simen Mountains, Ethiopia / - New York : Springer-Verlag , 1983 - vi, 189p : ISBN: 0-387-10592-1 Subjects--Topical Terms: Life Science Dewey Class. No.: G:55.6 / M1