@misc{indiciae332b72fef803,
  title = {Spatial considerations for instructional development in a virtual environment},
  author = {Mccarthy, Laurie and Pontecorvo, Michael and Grant, Frances and Stiles, Randy},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19960007827},
  note = {Source identifier: 19960007827}
}