@misc{indiciae42ac56da54da,
  title = {Computer programs for calculation of aerodynamic interference between lifting surfaces and lift and cruise fans},
  author = {Dillenius, M. F. E. and Mendenhall, M. R. and Spangler, S. B.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710023526},
  note = {Source identifier: 19710023526}
}