@misc{indiciaea4cb2514c841,
  title = {Gravity wave structure between 60 and 90 km inferred from Space Shuttle reentry data},
  author = {Fritts, David C. and Blanchard, Robert C. and Coy, Lawrence},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890045638},
  note = {Source identifier: 19890045638}
}