@misc{indiciae87c15c5b9684,
  title = {Simulation studies of air transport operational problems},
  author = {Lauber, J. K. and Billings, C. E. and Stevenson, J. E. and Ruffell-Smith, H. P. and Cooper, G. E.},
  year = {1976},
  url = {https://ntrs.nasa.gov/citations/19770011170},
  note = {Source identifier: 19770011170}
}