William I. Correa Suarez, Livrosca
$6.17
H. Koontz - H. Weihrich, Mcgraw Hill
$71.00
William A. Fleckenstein, Mcgraw Hill
$20.00
Freddy Zambrano, Atenea
$5.86
Bateman - Snell, Mcgraw Hill
$36.00
Gaceta N. 38.763, Njr
$1.00
Marco Aurelio Alegria, el Nacional
$1.00