@misc{indiciae648a8f18401a,
  title = {A practical solar energy heating and cooling system},
  author = {Oneill, M. J. and Mcdanal, A. J. and Sims, W. H.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730000156},
  note = {Source identifier: 19730000156}
}