@misc{indiciae9f41eec4cf1d,
  title = {A low-cost variable-proportion gas-metering system.},
  author = {R C Tindle},
  year = {1968},
  doi = {10.1016/0003-2697(68)90218-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/5716201/},
  note = {Source identifier: 5716201}
}