TY  - BOOK
AU  - Abbot,Charles Greeley
TI  - Leading Operations of the Smithsonian Astrophysical Observatory, 1895 to 1955
T2  - Smithsonian Miscellaneous Colections ; 
PY  - 1955///
CY  - Washington, D. C : 
PB  - Smithsonian Institution, 
ER  -