TY  - RPRT
TI  - Space missions to comets
AU  - Neugebauer, M.
AU  - Yeomans, D. K.
AU  - Brandt, J. C.
AU  - Hobbs, R. W.
PY  - 1979
UR  - https://ntrs.nasa.gov/citations/19800003722
ID  - 19800003722
ER  -