@misc{indiciaec9426decd269,
  title = {An investigation of digital spectral analysis programs and computer methods utilized at the Naval Postgraduate School in the analysis of high frequency random signals — Illustration, Page 41},
  year = {1972},
  url = {https://www.biodiversitylibrary.org/page/39831503},
  note = {Source identifier: page-39831503}
}