TY  - BOOK
AU  - Donn, B.
AU  - A'Hearn, M.
AU  - Jackson, W.
AU  - Mumma, M.
TI  - The study of comets: pt. 1
PY  - 1976///
CY  - Washington
PB  - National Aeronautics and Space Administration
KW  - Astronomy and astrophysics thesaurus
KW  - Comets
ER  -