00581nam a2200157Ia 4500 190327s9999||||xx |||||||||||||| ||und|| NITIL NITIL 21st 551.49 T472C Thomas, Harold E The Conservation of ground water a survey of the preseent ground water situation in the United States Harold E Thomas New York McGraw-Hill 1951 xv, 327p. Sponsard by the conservation foundation Ground waters-United States; Conservation of natural resources-United States BKS 40641 40641 0 0 DDC 0 0 NITIL NITIL 2019-04-04 0 551.49 T472C 7450 2019-04-04 00:00:00 2019-04-04 BKS