A. T. de Perez - E. Perez, Larense
$6.00
P. Montoya - M. Ramirez, Mcgraw Hill
$12.00
Gaceta No. 6.209, Ml, C.a.
$1.50
F. Sim - P. Choong, Lippincott
$226.00
Gaceta Nº 38.408, R Graficas
$2.00
Marcela Benassini, Prentice Hall
$20.88
W. Bauer - G. Westfall, Mcgraw Hill
$40.00
Gaceta Nº 40.468, la Piedra
$1.40
Hector Peñaranda Q., Luz
$10.00
Y. Cengel - J. Cimbala, Mcgraw Hill
$36.00
Roberto H. Frank, Mcgraw Hill
$32.00
