Norberto Lopez, Mcgrawhill

$40.00

Walter Riso, Planeta

$10.00

Gaceta Nº 28.737, Njr

$2.00

Angel R. Fajardo H., Editorial Nus Caracas

$5.40

Gaceta Nº 39.866, Njr

$2.00

Gaceta Nº 40.127, la Piedra

$3.00

Claude A. Villee, Mcgraw Hill

$51.86

Gaceta N° 6.207, Njr

$2.00

Eric Lindley, Anaya

$17.54

Laureano Carlo Santos, Luz

$14.03

Eugenio Ibarzabal, Diaz de Santos

$20.00

Luis Manuel Marcano S., Vadell Hermanos

$7.72

Walter Riso, Planeta

$10.00

Gaceta Nº 39.095, Njr

$2.00

$22.00

Varios Autores, Paredes

$10.00

Donald A. Neamen, Mcgraw Hill

$36.63

Flory Dieck, Mcgraw Hill

$30.00

Kerin - Hartley - Rudeliu, Mcgraw Hill

$58.31

Titiana B. de Maekelt, Ciencias Politicas

$7.17

Gaceta No. 6.017, Njr

$2.00

Jesus Rubio Espina

$1.00

J. Canfield - M.v. Hansen, Hci

$8.00

Gaceta Nº 37.125, la Piedra

$2.00

Wardlaw- Byrd, Mcgraw Hill

$70.00

$9.57

$10.00

Atilio Rojas, Libra

$13.89

F. Beer - R. Johnston, Mcgraw Hill

$32.00

$8.50