@misc{1155706,
  author = {Dudley B Chelton},
  title = {Helium refrigeration and liquefaction using a liquid hydrogen refrigerator for precooling:},
  year = {1960},
  month = {1960-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.TN.39},
  language = {en},
}