@misc{indiciaef6eabe6f1f9e,
  title = {Sun powered aircraft design},
  author = {Maccready, P. B. and Lissaman, P. B. S. and Morgan, W. R. and Burke, J. D.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19810048528},
  note = {Source identifier: 19810048528}
}