@misc{indiciae312abe1269d3,
  title = {Replica grating study, phase 5 Interim report, 30 Jun. - 31 Dec. 1968},
  author = {Gunter, R. C., Jr.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690008660},
  note = {Source identifier: 19690008660}
}