00278nam a2200097Ia 4500008004100000082002200041100002500063245005100088260003300139300000800172140113s9999    xx            000 0 und d  a577.47:574.9   J8  a"Elton, Charles. S."  aThe Ecology of invasions by animals and plants  a1958bChapman & HallcLondon  a181