Livian Navarro Caro, Panapo

$1.20

Carreño, Kingkolor

$7.20

L. Sagols - J. Linares, Mcgraw Hill

$25.20

H. Reichmann, Thomson

$42.00

Antonio Perez Esclarin, San Pablo

$8.40

Aldebaran Contreras, Davide Publicidad

$8.40

Pablo Rios Cabrera, Cognitus

$9.13

$6.07

Luis Quintana, Mcgraw Hill

$24.00

Prof. Ramon Grau, Ediciones Grau

$7.20

$10.20

Antonio Luis Cardenas, Dasa

$4.80

Miguel Del Cura, Paraninfo

$45.60

$14.40

Norman E. Gronlund, Trillas

$34.91