TY  - RPRT
TI  - A hardware simulation of a lunar midcourse navigation system using statistical filter theory and hand-held sextant observations
AU  - Christensen, J. V.
AU  - Mc Gee, L. A.
PY  - 1969
UR  - https://ntrs.nasa.gov/citations/19700000940
ID  - 19700000940
ER  -