Molecular biological taxonomy of some free-living nitrogen-fixing bacteria.
D001395:Azotobacter / Q000145:classification*; D001419:Bacteria / Q000145:classification*; D002247:Carbon Isotopes; D003470:Culture Media; D004269:DNA, Bacterial; D009586:Nitrogen Fixation; D011549:Pseudomonas / Q000145:classification*
D002247:Carbon Isotopes; D003470:Culture Media; D004269:DNA, Bacterial