@misc{indiciaeb41d566aa181,
  title = {Heat resistant substrates and battery separators made therefrom},
  author = {Langer, Alois and Scala, Luciano C. and Ruffing, Charles R.},
  year = {1976},
  url = {https://ntrs.nasa.gov/citations/20080006889},
  note = {Source identifier: 20080006889}
}