000			00334nam a2200145Ia 4500
008			140317s9999 xx 000 0 und d
082			_a631.4
100			_aFAO
245			_aDrainage of heavy soils.
260			_aRome _bFAO. _c1971
300			_a109
653			_aDrainage of Heavy Soil
653			_aSoil Science
942			_2ddc _cBK
999			_c7613 _d7613