@misc{indiciae01110bf1aa13,
  title = {A dynamical model of upper-atmospheric helium},
  author = {Straus, J. M. and Creekmore, S. P. and Ching, B. K.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770054300},
  note = {Source identifier: 19770054300}
}