TY  - BOOK
AU  - Gibbs, Sharon
TI  - Planispheric astrolabes from the national museum of American history
U1  - 522.41 
PY  - 1984///
CY  - Washington
PB  - Smithsonian Institution Press
KW  - astronomical instruments
KW  - Prismaric astrolabe - American history
ER  -