@misc{indiciae43bfb5ef40be,
  title = {Flipflop interrogator and bi-polar current driver Patent},
  author = {Chong, C. F. and Nelson, C. A.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19710010072},
  note = {Source identifier: 19710010072}
}