@misc{indiciaef2c4d2951f3a,
  title = {Optical absorption in a Kronig-Penney semiconductor.},
  author = {Goodman, R. R. and Wilsey, N. D.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19670053657},
  note = {Source identifier: 19670053657}
}