@misc{indiciae250533f212a6,
  title = {Mapping freeze/thaw boundaries with SMMR data},
  author = {Zuerndorfer, B. W. and England, A. W. and Dobson, M. C. and Ulaby, F. T.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890014590},
  note = {Source identifier: 19890014590}
}