Fraga Garcia, Trillas
$19.50
P. Samuelson - W Nordhaus, Mcgraw Hill
$57.00
C. Pelekais - P. Gonzalez, Cira Pelekais
$6.52
A. Chiang y K. Wainwright, Mcgraw Hill
$46.00
Valentin Gavidia Catalan, Magisterio
$6.00
Gaceta Nº 39.095, Njr
$1.40
Roberto H. Frank, Mcgraw Hill
$32.00
Gaceta No. 6.017, Njr
$2.00