$25.81

G. Katz - M. Katz, Mcgraw Hill

$6.00

$8.40

$7.59

D. Tovar - N. Gonzalez, Terra Editores

$23.68

M. Sanchez - I. Montoya, Trillas

$10.63

R. Rivero - C. Contreras, Romor

$7.80

Clara E. Martinez, Girasol Lite

$22.77

Sergio Medina Lopez, Noriega

$18.48

$25.81

M. Restrepo - L. Rios, Susaeta

$11.94

Lolita Robles de Mora, Premier

$7.20

Elba Albujas, Discolar

$13.20

I. Brito - M. Rull, Santillana

$25.81

$33.15