@misc{indiciaedcc0fe0c311f,
  title = {A teaching file, using 10 X 10 cm format copies.},
  author = {J D Mulder and C T Ruygrok},
  year = {1976},
  url = {https://pubmed.ncbi.nlm.nih.gov/948581/},
  note = {Source identifier: 948581}
}