Luis Quintana, Mcgraw Hill

$10.00

Frida Diaz Barriga Arceo, Mcgraw Hill

$30.00

Ana Ponce de Leon, Ccs

$12.00

Antonio Perez Esclarin, San Pablo

$7.00

Miguel Del Cura, Paraninfo

$38.00

H. Reichmann, Thomson

$35.00

Luis Quintana, Mcgraw Hill

$20.00

$1.27

A. Rubio Gil, Diaz de Santos

$28.00

Dario Linares Hernandez, Dl Editoriales

$8.91

Antonio Perez Esclarin, San Pablo

$6.08

Aldebaran Contreras, Davide Publicidad

$7.00

Pablo Rios Cabrera, Cognitus

$7.61

$8.50

Victor Colina, Biosfera

$7.70