TY  - GEN
AU  - Lang, Kenneth R. 
AU  - Gingerich, Owen
TI  - A Source book in astronomy and astrophysics, 1900-1975
SN  - 9780674822009
U1  - 520.8 
PY  - 1979///
CY  - Cambridge
PB  - Harvard University Press
KW  - Astronomy : Collected Papers
KW  - Astrophysics : Collected Papers
ER  -