$12.00

Kim Milne, Richmond

$7.28

Paul a Davies, Macmillan

$5.76

Jose F. Amador M., Editorial Educativa

$5.76

M. Estevez - M. Alvarez, Salesiana

$12.00

Olga Flores, Obelisco

$5.76

Nick Beare, Macmillan

$5.76

A. Cant - M. Charrington, Macmillan

$18.00

$29.90

Hans Mol, Macmillan

$14.40

Williams, Mcgraw Hill

$6.00

Kniveton - Llamas, Macmillan

$5.76

Sue Kay - Vaughan Jones, Macmillan

$5.76

F. Rivas - M. Alvarez, Salesiana

$12.00

Lenore Cohen, Richmond

$25.00