00532nam a2200133Ia 4500008004100000040001700041082002400058100002100082245012400103260003200227300001400259500004400273650008100317190327s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta551.49bT472C  aThomas, Harold E 4aThe Conservation of ground waterba survey of the preseent ground water situation in the United StatescHarold E Thomas  aNew YorkbMcGraw-Hillc1951  axv, 327p.  aSponsard by the conservation foundation  aGround waters-United States; Conservation of natural resources-United States