TY  - BOOK
AU  - Bedini,Silvio A.
AU  - Maddison,Francis
TI  - Mechanical universe: the astrarium of Giovanni de' Dondi 
T2  - Transactions of the American Philosophical Society
PY  - 1966///
CY  - Philadelphia
PB  - American Philosophical Society
KW  - Dondi dall'Orologio, Giovanni,
KW  - Planetariums
KW  - Astronomy, Medieval
KW  - fast
KW  - Italy
KW  - Specific orrery
KW  - Scientific instrument
KW  - History
N1  - Includes bibliographical references (pages 63-66)
ER  -