C. Burrus - J. Mcclellan, Prentice Hall
$12.28
Omar Rodriguez Aguero, Atenea
$7.17
J. Casal - J. Suarez, Ucab
$8.49
Gaceta Nº 40.112, Njr
$1.00
Gaceta 37.378, Rgrafica
$0.20
Gaceta No. 6.209, Ml, C.a.
$1.50
Francisco J. Gonzalez F., Fc Editorial
$30.00