000 00324nam a2200145Ia 4500
008 130223s9999 xx 000 0 und d
245 _aDrainage materials
260 _aRome
260 _bFAO
260 _c1972
300 _a122 p.
440 _aNo. 9; FAO, Irrigation and Dra
901 _pS152384
942 _cB
_2udc
999 _c120209
_d120209