@misc{indiciae613d453ffd7d,
  title = {Biological nitrogen fixation.},
  author = {W S Silver},
  year = {1967},
  doi = {10.1126/science.157.3784.100},
  url = {https://pubmed.ncbi.nlm.nih.gov/6067409/},
  note = {Source identifier: 6067409}
}