@book{book35aea1cd,
title   = {Proposta curricular para o ensino de matematica - segundo grau},
author = {Machado, Nílson José and Rodrigues, J C F and Jakubovic, J and Pavanello, R M and Barbosa, R. and Candido, S L},
year = {1989},
publisher = {Cenp}
}