@misc{indiciaebab8215f48ab,
  title = {Design guidelines for operator entry-exit systems on mobile equipment.},
  author = {D J Bottoms},
  year = {1983},
  doi = {10.1016/0003-6870(83)90153-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/15676467/},
  note = {Source identifier: 15676467}
}