Antonio Perez Esclarin, San Pablo

$8.40

H. Reichmann, Thomson

$42.00

$10.20

Frida Diaz Barriga Arceo, Mcgraw Hill

$36.00

Fe y Alegria, Estudios

$9.60

Abel Cortese, Planeta

$30.00

Prof. Ramon Grau, Ediciones Grau

$7.20

Victor Colina, Biosfera

$9.24

Jose Gregorio Bello P., Panapo

$7.20

Norman E. Gronlund, Trillas

$34.91

Luis Quintana, Mcgraw Hill

$24.00

$10.44

Pablo Rios Cabrera, Cognitus

$9.13

$6.07

L. Sagols - J. Linares, Mcgraw Hill

$25.20