TY  - RPRT
TI  - Pinhole X-ray/coronagraph optical systems concept definition study
AU  - Zehnpfenning, T. F.
AU  - Rappaport, S.
AU  - Wattson, R. B.
PY  - 1980
UR  - https://ntrs.nasa.gov/citations/19800023701
ID  - 19800023701
ER  -