J. Castillo - C. Basurto, Trillas
$6.00
M. Villasmil - B. Flores, Cadena Capriles
$5.56
E. de la Cruz - A. Rojas, Salesiana
$4.80
Jorge E. Burbano Ruiz, Mcgraw Hill
$35.00
Juan Eliezer Ruiz Blanco, Ediciones Libra
$14.74
Miguel Angel Ruiz Jimenes, Diaz de Santos
$26.00
Gaceta N. 38.763, Njr
$1.00
Gaceta N. 6.013, Rgraficas
$1.00
Dr. Ing. Harry Osers, Refolit C.a.
$12.28
Gaceta Nº 38.433, Njr
$1.26
Gaceta Nº 38.659, la Piedra
$1.09