TY  - BOOK
T1  - Source book in astronomy, 1900-1950.
DA  - Harvard University Press,
DA  - 1960.
CY  - Cambridge,
AU  - Shapley, Harlow,
CN  - QB3 .S52
CN  - QB3
PP  - Cambridge,
PY  - Harvard University Press,
PY  - 1960.
ID  - 57237
KW  - Astronomy.
TI  - Source book in astronomy, 1900-1950.
ER  -