TY  - RPRT
TI  - Viewing Phobos and Deimos for navigating Mariner 9.
AU  - Duxbury, T. C.
AU  - Born, G. H.
AU  - Jerath, N.
PY  - 1972
UR  - https://ntrs.nasa.gov/citations/19720061767
ID  - 19720061767
ER  -