TY  - BOOK
AU  - Ifrah, Georges
AU  - Bellos, David [... et al]
TI  - Universal history of numbers: from prehistory to the invention of the computer
SN  - 1-86046-324-X
PY  - 1981///
CY  - London
PB  - The Harvill Press
KW  - Numbers, History
KW  - Numeral notation system - History
KW  - Counting and calculating - Mathematics
ER  -