TY - BOOK AU - B. Nievergelt TI - Ibexes in an african environment : Ecology and Social system of the walia ibex in the simen mountains, ethiopia SN - 3-540-10592-1 U1 - 599.7358 PY - 1981/// CY - Berlin PB - Springer Verleag N1 - B. Nievergelt: Ibexes in an african environment : Ecology and Social system of the walia ibex in the simen mountains, ethiopia. Berlin. Springer Verleag, 1981. 3-540-10592-1--(599.7358NIE) ER -