@misc{indiciae4b3d6adace0f,
  title = {[A simplified method for photographic subtraction using a 90 second processer].},
  author = {O Fiebach and K Dorr},
  year = {1972},
  url = {https://pubmed.ncbi.nlm.nih.gov/4343397/},
  note = {Source identifier: 4343397}
}