@misc{indiciae93bd6f9d904c,
  title = {Commercial phosphoric acid fuel cell system technology development},
  author = {Prokopius, P. R. and Warshay, M. and Simons, S. N. and King, R. B.},
  year = {1979},
  url = {https://ntrs.nasa.gov/citations/19790067796},
  note = {Source identifier: 19790067796}
}