@misc{indiciaef6e6c6a0d612,
  title = {An improved standard specimen for alignment of electron microscopes.},
  author = {Carson, K. R. and Rudee, M. L.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19680033239},
  note = {Source identifier: 19680033239}
}