000 00472nam a2200145Ia 4500
008 140712s9999 xx 000 0 und d
041 _aENG
080 _a631.4(100)(063)
_bNON
245 _aNon-symbiotic nitrogen fixation and organic matter in the tropics
260 _c1982
_aNew Delhi
_bInternational Congress of Soil Science
300 _avi, 266
650 _aSoil SciencesSoil Mechanics
710 _aIndia. International Congress of Soil Science
942 _2UDC
_cBK
999 _c6426
_d6426