Juan R. Cuadrado Roura, Mcgraw Hill
$30.00
Frederick Cabrera Conde, Ediciones Mutare
$10.00
F. Villasmil - M. Villasm, Libreria Europa
$1.00
Robert S. Feldman, Mcgraw Hill
$40.00
Emilia Bermudez, Cpluz
$6.00
P. Montoya - M. Ramirez, Mcgraw Hill
$12.00
Fidias G. Arias, Episteme
$8.04
Gyawaly, Lippincott
$50.23