TY  - SER
AU  - Kopal, Zdenek ed.
TI  - Advances in astronomy and astrophysics,: 9v
SN  - 0065-2180
U1  - 520.58 
PY  - 1972///
CY  - New York
PB  - Academic Press
KW  - Astronomy--Periodicals
KW  - .Astrophysics--Periodicals
ER  -