@misc{indiciae43bd86a3cd8e,
  title = {Solar cell performance - Mathematical model Quarterly report, 1 Jun. - 31 Aug. 1969},
  author = {Barrett, M. J.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690029856},
  note = {Source identifier: 19690029856}
}