M. Velhagen - E, Calderon, Trillas
$6.00
D. Lopez - M. Rodriguez, Everest
$7.50
Gaceta N. 39.912, la Piedra
$2.50
J.m. Smith - H. Van Ness, Mcgraw Hill
$89.00
Hector R. Peñaranda Q., Ediluz
$13.13
Anil K. Lalwani, Macgraw Hill
$48.00
Idalberto Chiavenato, Mcgraw Hill
$27.00
Jorge E. Burbano Ruiz, Mcgraw Hill
$35.00
M. Width - T. Reinhard, Lippincott
$25.00
H. Gutierrez-r.de la Vara, Mcgraw Hill
$50.00