@misc{indiciae7f984ca0e38d,
  title = {Interstellar extinction by graphite, iron and silicate grains.},
  author = {N C Wickramasinghe and K Nandy},
  year = {1970},
  doi = {10.1038/227051a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/16057822/},
  note = {Source identifier: 16057822}
}