$14.00

Elba Albujas Veliz, Biosfera

$17.00

I. Brito - M. Rull, Santillana

$17.00

R. Diaz - N. Diaz, Saber

$14.00

Elba Albujas Veliz, Biosfera

$17.00

D. Vasquez - F. Ramirez, Actualidad Escolar 2000

$16.90

$2.00

Yris Molina G., Monfort

$14.00

A. Rondon - I. Berroteran, Salesiana

$10.00

$5.00

Maria Pereira-p. Velasco, Trillas

$9.10

Jose Salgado, Discolar

$10.00

$5.00

Marcela Hinojosa de Coria, Trillas

$5.74

Sofia Smeke M., Noriega

$15.60