TY  - RPRT
TI  - Tone-activated, remote, alert communication system
AU  - Baker, C. D.
AU  - Couvillon, L. A.
AU  - Hubbard, W. P.
AU  - Kollar, F. J.
AU  - Postal, R. B.
AU  - Tegnelia, C. R.
PY  - 1971
UR  - https://ntrs.nasa.gov/citations/19710000305
ID  - 19710000305
ER  -