TY  - BOOK
AU  - Alter,G.
AU  - Ruprecht,J.
TI  - The System of open star clusters and our galaxy
T2  - Czechoslovak academy of sciences
AV  - QB801  A58 1963 
PY  - 1963///
CY  - New York : 
PB  - Academic press, 
KW  - Lemb
KW  - Costelaciones
ER  -