000 00336nam a2200109Ia 4500
008 130225s9999 xx 000 0 und d
245 _aBiological nitrogen fixation: Towards poverty alleviation through sustainable ag
260 _aUNESCO
_bSpringer
_c2008
440 _aCurrent plant science and bio
901 _a288121
942 _cB
_2udc
999 _c18223
_d18223