TY  - BOOK
AU  - Lang,Kenneth R.
AU  - Gingerich,Owen
TI  - A Source book in astronomy and astrophysics, 1900-1975
SN  - 0674822005
U1  - 520/.8 
PY  - 1979///
CY  - Cambridge, Mass.
PB  - Harvard University Press
KW  - Astronomy
KW  - Addresses, essays, lectures
KW  - Astrophysics
N1  - Includes bibliogr. references and indexes
ER  -