@misc{indiciae445de75c023f,
  title = {Skylab altimeter observations over terrain},
  author = {Shapiro, A. and Thormodsgard, J. M. and Okada, J. M.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19760009463},
  note = {Source identifier: 19760009463}
}