@misc{indiciae29a7040eb89b,
  title = {Nitrogen fixation by gram-negative bacteria.},
  author = {M H PROCTOR and P W WILSON},
  year = {1958},
  doi = {10.1038/182891a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/13590163/},
  note = {Source identifier: 13590163}
}