M. Velhagen - E, Calderon, Trillas
$6.00
Ricardo Bulmez, Urania
$15.00
Jesus Mora Contreras, Ula
$7.00
P. Samuelson - W Nordhaus, Mcgraw Hill
$57.00
Maria Teresa Machado, Maria Teresa Machado
$7.00
Gaceta Nº 5.805, Njr
$2.00
Gaceta Nº 39.112, Njr
$2.00
O. Quiros - J. Quiros, Amolca
$42.00