00321nam a22001217a 450000500170000004100060001710000190002324500510004226400170009330000170011052000570012765000150018420260324130505.0  a1  aGERDES, Paulus  aEtomatatematicabCultura, Matematica, educacao  aMaputoc1991  a116b1c23cm  acoletanea de textos de matematica cultura e educacao  amatematica