@misc{indiciaefd9709327b12,
  title = {A Prototype Real-Time Area Differential GPS System},
  author = {Bertiger, W. I. and Bar-Sever, Y. E. and Haines, B. J. and Lijima, B. A. and Lichten, S. M. and Lindqwister, U. J. and Mannucci, A. J. and Muellerschoen, R. J. and Munson, T. N. and Moore, A. W. and Romans, L. J. and Wilson, B. D. and Wu, S. C. and Yunck, T. P. and Piesinger, G. and Whitehead, M.},
  year = {1997},
  url = {https://ntrs.nasa.gov/citations/20060034922},
  note = {Source identifier: 20060034922}
}