@misc{indiciaea2fbff0722f3,
  title = {Electron microscope method for measuring diffraction grating groove geometry.},
  author = {Anderson, W. A. and Griffin, G. L. and Mooney, C. F. and Wiley, R. S.},
  year = {1965},
  url = {https://ntrs.nasa.gov/citations/19650046822},
  note = {Source identifier: 19650046822}
}