@misc{indiciae41e216cff390,
  title = {Thin layer chromatography/densitometry with transferable calibration factors.},
  author = {H Bethke and R W Frei},
  year = {1976},
  doi = {10.1021/ac60365a056},
  url = {https://pubmed.ncbi.nlm.nih.gov/1244768/},
  note = {Source identifier: 1244768}
}