@misc{indiciae6cd1a4b10848,
  title = {Photovoltaic array environmental protection program},
  author = {Bilger, Kevin M. and Gjerde, Helen B. and Sater, Bernard L.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19900051033},
  note = {Source identifier: 19900051033}
}