000			00335nam a2200133Ia 4500
008			130225s9999 xx 000 0 und d
100			_aFlaigm, W
245			_aOrganic materials and soil productivity
260			_aRome _bFAO _c1977
300			_a119 p.
440			_aNo. 35; FAO, Soils Bulletin
901			_a144708
942			_cB _2udc
999			_c11319 _d11319