TY  - BOOK
AU  - Harwit, Martin
AU  - 
TI  - Astrophysical concepts
U1  - 523.03 
PY  - 1973///
CY  - New York
PB  - Wiley Eastern
KW  - Astronomical physics
KW  - Physics, Astronomical
KW  - Astrophysics
KW  - Spectroscopy
KW  - black holes
KW  - Spectrum analysis
KW  - Astronomy
KW  - Physics
KW  - Stars
ER  -