@misc{indiciae49d93217c964,
  title = {Trace element concentrations in commercially available solutions.},
  author = {R P Hoffmann and D M Ashby},
  year = {1976},
  doi = {10.1177/106002807601000201},
  url = {https://pubmed.ncbi.nlm.nih.gov/10304760/},
  note = {Source identifier: 10304760}
}