@misc{indiciaed05890081eed,
  title = {Imaging studies of comets},
  author = {Niedner, Malcolm B., Jr. and Klinglesmith, Daniel A., III and Westpfahl, David J.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19920003618},
  note = {Source identifier: 19920003618}
}