000 00457 a2200253 4500
001 123503
020 _a6
041 _aeng
080 _a551.495 Ver
245 _aTheory of groundwater flow.
250 _a
260 _a
260 _bMacmillan, London,
260 _c1970
300 _ap.x, 190, illus., 23cm.
300 _c
490 _a
100 _aVerruijt. A.\
700 _a
650 _a
650 _a
942 _cBK
942 _2UDC
999 _c78814
_d78814