TY  - BOOK
CN  - QB721 .S74
CN  - QB721
CY  - Washington :
DA  - 1976.
ID  - 104704
KW  - Comets
PB  - Scientific and Technical Information Office, National Aeronautics and Space Administration,
PP  - Washington :
PY  - 1976.
T1  - The study of comets :the proceedings of IAU Colloquium no. 25, held at Goddard Space Flight Center, Greenbelt, Maryland, October 28-November 1, 1974 /
TI  - The study of comets :the proceedings of IAU Colloquium no. 25, held at Goddard Space Flight Center, Greenbelt, Maryland, October 28-November 1, 1974 /
ER  -