Antonio Perez Esclarin, San Pablo

$6.00

Dario Linares Hernandez, Dl Editoriales

$10.69

$10.44

Norman E. Gronlund, Trillas

$34.91

$1.52

$14.40

$6.07

A. Rubio Gil, Diaz de Santos

$33.60

Fe y Alegria, Estudios

$9.60

L. Sagols - J. Linares, Mcgraw Hill

$25.20

Abel Cortese, Planeta

$30.00

Prof. Ramon Grau, Ediciones Grau

$7.20

Luis Quintana, Mcgraw Hill

$12.00

Victor Colina, Biosfera

$9.24

Antonio Luis Cardenas, Dasa

$4.80