TY  - BOOK
AU  - H७yrup, Jens.
TI  - Jacopo da Firenze.s Tractatus Algorismi and Early Italian Abbacus Culture [electronic resource]
SN  - 9783764383916
U1  - 510.9 
PY  - 2007///
CY  - Basel
PB  - Birkh user Verlag AG
N1  - http://dx.doi.org/10.1007/978-3-7643-8391-6
ER  -