H. Reichmann, Thomson

$42.00

Antonio Perez Esclarin, San Pablo

$7.30

Fe y Alegria, Estudios

$9.60

Antonio Luis Cardenas, Dasa

$4.80

Victor Colina, Biosfera

$9.24

Antonio Perez Esclarin, San Pablo

$8.40

Norman E. Gronlund, Trillas

$34.91

Jose Gregorio Bello P., Panapo

$7.20

$6.07

Frida Diaz Barriga Arceo, Mcgraw Hill

$36.00

$10.44

$6.07

$14.40

Ana Ponce de Leon, Ccs

$14.40

$10.44