000 00358nam a2200145Ia 4500
008 130223s9999 xx 000 0 und d
245 _aDrainage in heavy soils
260 _aRoorkee
260 _bNational Institute of Hydrology
260 _c1988
300 _a14 p.
440 _aTN-37; National Institute of H
901 _pS42441
942 _cB
_2udc
999 _c120205
_d120205