Gaceta Nº 40.112, Njr
$1.00
C. Stone - R. Humphries, Mcgraw Hill
$90.00
Saez-fernandez-gutierrez, Mcgraw Hill
$63.04
Gaceta N. 38.763, Njr
$1.00
J. Casal - J. Suarez, Ucab
$8.49
M. Morris Mano - Ch. Kime, Prentice Hall
$22.00
Margarita A. de Sanchez, Trillas
$25.00