F. Kerlinger - H. Lee, Mcgraw Hill
$43.29
Gaceta N. 6.667, Ml, C.a.
$6.00
H. Rondon de Sanson, Paredes
$7.50
Jorge E. Burbano Ruiz, Mcgraw Hill
$35.00
Gaceta Nº 38.596, la Piedra
$2.85
Gaceta Nº 38.999 - 5.890, Njr
$2.00
Gaceta Nº 40.440, la Piedra
$1.40
Francisco J. Gonzalez F., Fc Editorial
$30.00
Oscar Hernandez Alvarez, Aiadtss
$7.00