00435nam a2200169Ia 4500008004100000020001500041082001700056100002200073245002600095250000600121260004000127300000800167650001800175650004200193653001600235653001400251170901s1980    xx            000 0 und d  a047108641X  a551.49bT57G  aTodd, David Keith 0aGroundwater Hydrology  a2  aNew YorkbJohn Wiley and Sonsc1980  a535  aPure Sciences  aScience of the earth and other worlds  aGroundwater  aHydrology