TY  - BOOK
AU  - Shapley,Harlow
TI  - Source book in astronomy, 1900-1950
AV  - QB3 .S52
U1  - 520.82 
PY  - 1960///
CY  - Cambridge
PB  - Harvard University Press
KW  - Astronomy
N1  - "Identification and sources": p. [411]-417
ER  -