M. Velhagen - E. Calderon, Trillas
$6.00
Gaceta Nº 1.575, Njr
$2.00
Luis Peru de Lacroix
$1.00
Alayon - Carballo - Daza, Ucab
$9.15
H. Koontz - H. Weihrich, Mcgraw Hill
$72.00
Gaceta No. 39.027, Njr
$1.00
D. Eiteman - A. Stonehill, Prentice Hall
$35.00
Tolo M. Rimsky, Mcgraw Hill
$41.00
Juan Eliezer Ruiz Blanco, Ediciones Libra
$14.74
F. Sim - P. Choong, Lippincott
$226.00