00441nam a2200097Ia 4500008004100000082004600041100004800087245014900135260005100284300000800335140113s9999    xx            000 0 und d  a"661.5:631.84""4/10.8.1985""(082.2)   M5"  a"Evans, H.J., Bottomley,P.J. & Newton,W.E."  a"Nitrogen Fixation Research Progress :Proceedings of the 6th international symposium on nitrogen fixation, August 4-10, 1985 held at Corvallis."  a1985bMartines Nighoff PublisherscNetherlands  a731