S. Joo - A. Kau, Lippincott
$57.60
William A. Fleckenstein, Mcgraw Hill
$20.00
Gaceta N° 40.029, Njr
$1.00
Gaceta, la Piedra
$4.00
Hector R. Peñaranda Q., Ediluz
$13.13
Carlos E. Weffe H., Avdt
$7.74
Luis Alberto Rodriguez, Livrosca
$8.50