TY  - GEN
AU  - Harwit, Martin
TI  - Astrophysical concepts
SN  - 0471358207
U1  - 523.01  
PY  - 1973///
CY  - New York : 
PB  - John Wiley and sons
KW  - Astrophysics
N1  - Includes  bibliography and index
ER  -