000 00333nam a2200133Ia 4500
008 130223s9999 xx 000 0 und d
245 _aNitrogen and soil organic matter : Proceedings
260 _aLondon
260 _c1969
300 _a178 p.
440 _aNo. 15; Great Britain Ministry
901 _pS17103
942 _cB
_2udc
999 _c128390
_d128390