F. Barriga - G. Hernandez, Mcgraw Hill
$28.00
C. Verde - S. Gentil, Trillas
$20.00
Dr. Ing. Harry Osers, Refolit C.a.
$12.28
Bateman - Snell, Mcgraw Hill
$36.00
S Berti - S Cordoliani, Fundacion Empresas Polar
$2.25
Gaceta Nº 6.017, Njr
$2.00
Gaceta N. 40.639, la Piedra
$4.00