TY  - BOOK
AU  - RONAN,Colin
AU  - 
TI  - Optical astronomy : 
U1  - 523/ROO 
PY  - 0000///E.L.B.S.
PY  - 1965///
CY  - London. 
KW  - Astonomy.
KW  - Astonomy
N1  - Includes index and bibliography.
ER  -