TY  - BOOK
AU  - Frankel,Tobia
ED  - National Museum of History and Technology.
TI  - Timekeepers: from sundials to atomic clocks 
PY  - 1977///
CY  - Washington
PB  - Smithsonian Institution
KW  - National Museum of History and Technology
KW  - Catalogs
KW  - Clocks and watches
KW  - History
KW  - USA
KW  - Smithsonian Washington
KW  - Catalog clock watch
KW  - Timekeeper (general)
ER  -