000 00309nam a2200121Ia 4500
008 191031s9999 xx 000 0 und d
100 _aHardarson (G) Ed
245 0 _aBreeding begmes for enhanced symbiotic nitrogen fixaiton
260 _bMartinus Nijhoty
260 _c1984
365 _b660
942 _cBK
999 _c215291
_d215291