@misc{indiciaeed62c1168def,
  title = {Electron-Focus Adjustment for Photo-Optical Imagers},
  author = {Fowler, Walter B. and Flemming, Keith and Ziegler, Michael M.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19870000383},
  note = {Source identifier: 19870000383}
}