@misc{1173651,
  author = {Frank L Howard},
  title = {Letter Circular 1001::liquefied petroleum gas as an engine fuel},
  year = {1951},
  month = {1951-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.LCIRC.1001},
  language = {en},
}