$20.80

Clara E. Martinez, Girasol Lite

$22.77

Victor M. Rodriguez, Trillas

$11.94

$1.80

Ines Silva Legorbu, Santillana

$11.38

$8.40

Freddy Suarez Figueroa, Disutextos

$24.70

Sergio Medina Lopez, Noriega

$18.48

Juan J. Gutierrez, Girasol

$27.50

$21.31

I. Brito - M. Rull, Santillana

$20.00

Francisco Avila, Saber

$12.00

Pablo Bravo, Biosfera

$18.20

Gisela Soto, Actualidad Escolar 2000

$13.00

Marcela Hinojosa de Coria, Trillas

$9.10