Gisela Soto, Cobo

$10.00

Ana Maria Maqueo, Noriega

$13.00

Mercedez Hernandez Perez, Biosfera

$18.00

Ines Silva de Legorburu, Santillana

$6.22

M. Sanchez - I. Montoya, Trillas

$7.00

G. Katz - M. Katz, Mcgraw Hill

$5.00

Luis E. Rincon V., Girasol

$19.00

M. Bermudez-t. Moscarella, Santillana

$7.00

$1.15

Yolanda de Bremo, Premier

$5.00

Sergio Medina Lopez, Noriega

$14.00

$11.01

$19.00

Maria Pereira-p. Velasco, Trillas

$9.10

Ines Silva Legorbu, Santillana

$7.50