@misc{indiciae3afe706be0d3,
  title = {Charcoal Activation.},
  author = {H H Sheldon},
  year = {1920},
  doi = {10.1073/pnas.6.4.178},
  url = {https://pubmed.ncbi.nlm.nih.gov/16576486/},
  note = {Source identifier: 16576486}
}