Maria Teresa Machado C., Coleccion Conocer
$5.80
Gaceta No 39.599, R Graficas
$2.00
Hector R. Peñaranda Q., Ediluz
$13.13
Jorge E. Burbano Ruiz, Mcgraw Hill
$35.00
I. Fernandez - A. Camacho, Diaz de Santos
$45.00
Piergiorgio Corbetta, Mcgraw-hill
$38.00