@misc{1184151,
  author = {W J Niessing},
  title = {Laboratories technically qualified to test solar collectors in accordance with ASHRAE Standard 93-77 ::a summary report},
  year = {1978},
  month = {1978-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.78-1535},
  language = {en},
}