$25.81

Pablo Bravo, Biosfera

$23.76

Maira Molina, Actualidad

$28.80

G. Katz - M. Katz, Mcgraw Hill

$6.00

$31.88

Yris Molina G., Monfort

$7.20

Marcos J. Alfonso B., Santillana

$9.11

Yris Molina G., Monfort

$7.20

Maria Pereira-p. Velasco, Trillas

$12.00

Bellanira J. Barcenas V., Saber

$15.60

Marcela Hinojosa de Coria, Trillas

$9.11

Sergio Medina Lopez, Noriega

$18.48

Fernando Gonzalez Lucini, Estudios - Anaya

$11.94

Elba Albujas Veliz, Biosfera

$22.44

Juan J. Gutierrez, Girasol

$28.84