TY  - BOOK
AU  - Neugebauer, Marcia.
CN  - NAS 1.55:
CN  - QB721
CY  - Washington, D.C. :
DA  - 1979.
ID  - 180312
KW  - Comets
PB  - National Aeronautics and Space Administration, Scientific and Technical Information Branch,
PP  - Washington, D.C. :
PY  - 1979.
T1  - Space missions to comets :a conference /
TI  - Space missions to comets :a conference /
ER  -