.
Liber abaci
CAPITOLUM NONUM
PARS SECUNDA
IX.2.1
IX.2.2
IX.2.3
IX.2.4
IX.2.5
IX.2.6
IX.2.7
IX.2.8
IX.2.9
IX.2.10
IX.2.11
IX.2.12
IX.2.13
IX.2.14
IX.2.15
IX.2.16
IX.2.17