TY  - BOOK
AU  - Kopal, Zdenek, ed.
TI  - Advances in astronomy and astrophysics: vol. IV
PY  - 1966///
CY  - New York
PB  - Academic Press
KW  - Astronomy
KW  - Astronomy and Astrophysics Thesaurus
KW  - Astrophysics
ER  -