@misc{indiciae6f9a449abe7c,
  title = {Contour spectrograms for POGO analysis},
  author = {Ackerman, A. T. and Ferrara, L. A. and Oconnor, J. J.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700020826},
  note = {Source identifier: 19700020826}
}