TY  - BOOK
AU  - Russell,Henry Norris
AU  - Dugan,Raymond Smith
AU  - Stewart,John Quincy
TI  - Astronomy: A revision of young's manual of astronomy 
PY  - 1945///
CY  - Boston, New York
PB  - Ginn and Co.
KW  - Աստղագիտություն
N1  - I. The solar system
ER  -