@misc{indiciae1979ef1944a0,
  title = {Spaceborne earth applications ranging system /SPEAR/},
  author = {Vonbun, F. O. and Kahn, W. D. and Argentiero, P. D. and Koch, D. W.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770057972},
  note = {Source identifier: 19770057972}
}