@misc{indiciae37617ef1eb14,
  title = {Particle sampling from noctilucent clouds},
  author = {Hemenway, C. L. and Soberman, R. K. and Witt, G.},
  year = {1963},
  url = {https://ntrs.nasa.gov/citations/19640005644},
  note = {Source identifier: 19640005644}
}