TY  - BOOK
AU  - Kopal, Zdenek
TI  - Close binary systems
T2  - International astrophysics series; v. 5
PY  - 1959///
CY  - London
PB  - Chapman and Hall
KW  - Astronomy and astrophysics thesaurus
KW  - Close binary stars
KW  - Contact binary stars
ER  -