00280nam a2200109Ia 4500008004100000082001500041100001400056245004100070250000800111260004300119300000800162190709s9999    xx            000 0 und d  a523.18M785  aHelm A.L. 0ahte true Book About Worlds Around us  a2nd  aLondonbFrederick Muller limitedc1960  a138