@misc{indiciaea753869d84df,
  title = {The Nitrogen Problem in Arid Soils.},
  author = {C B Lipman},
  year = {1915},
  doi = {10.1073/pnas.1.9.477},
  url = {https://pubmed.ncbi.nlm.nih.gov/16576051/},
  note = {Source identifier: 16576051}
}