00477nam a2200169Ia 4500008004100000020001500041082001900056100002400075245004500099260005500144300000800199650002300207650001800230653002200248653001300270700002400283170901s1999    xx            000 0 und d  a0306461374  a589.7072bM38E  aMartinez, Esperanza 0aHighlights of Nitrogen Fixation Research  aNew YorkbKluwer Academic/ Plenum Publishersc1999  a305  aBotanical sciences  aPure Sciences  aNitrogen fixation  aResearch  aHernandez, Georgina