000 nam a22 4500
082 _a631.7
_bF6d
_d1972
090 _c11022
_d11022
100 _aFood and Agriculture Organization
245 _aDrainage materials
260 _aRome
_bFood and Agriculture Organization
_c1972
300 _a122 page
942 _c22
999 _c10427
_d10427