TY  - RPRT
TI  - Observational result on x-rays.
AU  - Clark, D. B.
AU  - Fisher, P. C.
AU  - Meyerott, A. J.
AU  - Smith, K. L.
PY  - 1964
UR  - https://ntrs.nasa.gov/citations/19650033789
ID  - 19650033789
ER  -