Eduardo Rosset Cardenal, Publisher Fifth Avenue
$4.80
Hector R. Peñaranda Q., Cpluz
$10.00
Gaceta No. 39.027, Njr
$1.00
C. Burrus - J. Mcclellan, Prentice Hall
$12.28
Juan R. Cuadrado Roura, Mcgraw Hill
$30.00
I. Fernandez - A. Camacho, Diaz de Santos
$45.00
Marcela Benassini, Prentice Hall
$20.88