@misc{indiciae7dc57ae49f7a,
  title = {Gingival tissue retraction for the elastic impression materials.},
  author = {A W Bull and G I Brinsden},
  year = {1967},
  doi = {10.1111/j.1834-7819.1967.tb02206.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4860964/},
  note = {Source identifier: 4860964}
}