@misc{indiciae1f5214f7472e,
  title = {A delta modulation threshold extension technique for frequency modulation systems},
  author = {Arndt, G. D. and Loch, F. J.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700056443},
  note = {Source identifier: 19700056443}
}