@misc{indiciaeb26b130be68a,
  title = {Aluminum planchet counting: a simple method for improved sample spreading.},
  author = {G L Choules and L F Guymon},
  year = {1972},
  doi = {10.1016/0003-2697(72)90194-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/4557424/},
  note = {Source identifier: 4557424}
}