@misc{indiciae363f015251f7,
  title = {An improved method for preparing perforated carbon films for electron microscopy using ultrasonic vibration.},
  author = {H S Johnston and O Reid},
  year = {1971},
  url = {https://pubmed.ncbi.nlm.nih.gov/5172449/},
  note = {Source identifier: 5172449}
}