Gaceta Nº 6.117, Rgraficas 2021
$1.00
Marco Aurelio Alegria, el Nacional
$1.00
Gaceta N. 40.639, Njr
$2.00
Mcphee, Mcgrawhill
$72.60
S Berti - S Cordoliani, Fundacion Empresas Polar
$2.25
Freddy Zambrano, Atenea
$5.86
Luciano Lupini Bianchi, Ciencias Politica
$6.00