@misc{indiciae9200e39947de,
  title = {Proceedings: Scientific communications.},
  author = {J Z Heckmatt and R A Shanks},
  year = {1975},
  doi = {10.1136/adc.50.11.903},
  url = {https://pubmed.ncbi.nlm.nih.gov/1108809/},
  note = {Source identifier: 1108809}
}