@misc{1182316,
  author = {Walter H Parken and George E Kelly and David A Didion},
  title = {Methods of testing, rating and estimating the heating seasonal performance of heat pumps:},
  year = {1980},
  month = {1980-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.80-2002},
  language = {en},
}