M. Galera - M. I. Galera, Trillas
$6.00
Gaceta Nº 40.106, Njr
$2.00
Ricardo Bulmez, Urania
$15.00
P. Samuelson - W Nordhaus, Mcgraw Hill
$57.00
F. Villasmil - M. Villasm, Libreria Europa
$1.00
Gaceta Nº 39.945, Njr
$2.00
Gaceta Nº 30.597, Njr
$1.00
D. Fitzgibbon - J. Loeser, Lippincott
$125.00