M. Velhagen - E, Calderon, Trillas
$6.00
J. Sanchez - S. Serrano, Diaz de Santos
$25.00
Y. Cengel - J. Cimbala, Mcgraw Hill
$36.00
Ezequiel Ander- Egg, Lumen
$8.70
Fidias G. Arias, Episteme
$8.04
Tito Balza Santaella, Tito Balza Santaella
$5.00
Horacio Garcia Belsunce, Depalma
$9.26
Gaceta No. 6.017, Njr
$2.00