000 00273nam a2200121Ia 4500
008 161121s9999 xx 000 0 und d
100 _aSUBBA RAO (NS)
245 0 _aBiological nitrogen fixation recent deve
260 _cNIL
365 _b0
650 _aNIL
942 _cBK
999 _c95184
_d95184