@article{article5beb65eb,
title   = {Chemistry and chemical education through text and image: analysis of twentieth century textbooks used in brazilian context},
author = {Souza, Karina Aparecida de Freitas Dias de and Porto, Paulo Alves},
year = {2012},
doi = {10.1007/s11191-012-9442-z},
journal   = {Science & Education}
}