TY  - BOOK
AU  - Babbage,Charles
AU  - Morrison, Emily
AU  - Morrison,Philip
TI  - Charles babbage on the principles and development of the calculator: And other seminal writings 
SN  - 0486246914
AV  - QA20.C34 B33
PY  - 1961///
CY  - New York
PB  - Dover
KW  - Calculadoras
ER  -