TY  - RPRT
TI  - Method and apparatus for measuring frequency and phase difference
AU  - Shores, Paul
AU  - Lichtenberg, Christopher
AU  - Kobayashi, Herbert S.
AU  - Cunningham, Allen R.
PY  - 1986
UR  - https://ntrs.nasa.gov/citations/19870009259
ID  - 19870009259
ER  -