@misc{indiciae3be238054296,
  title = {User documentation for the MSK and OMS intelligent tutoring systems},
  author = {Fink, Pamela K. and Herren, L. Tandy and Lincoln, David T.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910023509},
  note = {Source identifier: 19910023509}
}