@misc{indiciae1611dbddb500,
  title = {Tape-slides or lectures.},
  author = {R M Harden and R Lever and W R Dunn and A Lindsay and C Holroyd and G M Wilson},
  year = {1969},
  doi = {10.1016/s0140-6736(69)90365-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/4185627/},
  note = {Source identifier: 4185627}
}