Prof. Ramon Grau, Ediciones Grau

$7.20

Fe y Alegria, Estudios

$9.60

Victor Colina, Biosfera

$9.24

Antonio Perez Esclarin, San Pablo

$6.00

$1.52

$10.20

$14.40

Jose Gregorio Bello P., Panapo

$7.20

A. Rubio Gil, Diaz de Santos

$33.60

Abel Cortese, Planeta

$30.00

Norman E. Gronlund, Trillas

$34.91

$10.44

Frida Diaz Barriga Arceo, Mcgraw Hill

$36.00

Carreño, Kingkolor

$7.20

Luis Quintana, Mcgraw Hill

$24.00