Sue Kay - Vaughan Jones, Macmillan
$1.00
Maricarmen Paz Miranda, Atenea
$7.00
Margarita A. de Sanchez, Trillas
$25.00
Omar Rodriguez Aguero, Atenea
$7.17
Gaceta Nº 6.017, Njr
$2.00
M. Morris Mano - Ch. Kime, Prentice Hall
$22.00
Gabriel A. Cabrera Ibarra, Vadell Hermanos
$7.00