TY  - BOOK
AU  - Ronan,Colin A.
TI  - Changing views of the universe / 
U1  - 520.9 RON 
PY  - 1961///
CY  - New York: 
PB  - Macmillan , 
KW  - Astronomy
KW  - History
N1  -  Bibliography: p. 198-199
ER  -