@misc{indiciae52b373251ab3,
  title = {Custom shade guide system for composite resins.},
  author = {S Wieder},
  doi = {10.1111/j.1708-8240.1990.tb00596.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/2098058/},
  note = {Source identifier: 2098058}
}