TY  - BOOK
AU  - Shapley, Harlow, ed.
TI  - Source book in astronomy 1900-1950
PY  - 1960///
CY  - Cambridge
PB  - Harvard University Press
KW  - Astronomy and Astrophysics Thesaurus
KW  - Astronomy-History
KW  - Astrophysics
ER  -