W. Hurley - C. Denegar, Lippincott

$88.28

F. Kerlinger - H. Lee, Mcgraw Hill

$51.94

Carlos Sabino, Panapo

$6.55

Rafael Benitez Dominguez, Cadiz

$14.73

J. Hessen, Juceda

$9.60

Yilmar Campbell, Universidad Carabobo

$9.60

R. Hernandez - N. Mendoza, Mcgraw Hill

$30.00

Alexis G. Perez, Fedupel

$12.51

S. Dominguez - E. Sanchez, Mcgraw Hill

$24.00

Margarita A. de Sanchez, Trillas

$39.46

Aura Marina Bavaresco, la Universidad Del Zulia

$9.00

Odalis Cañizalez, Cv. Editores

$15.00

Julian Rodriguez, San Pablo

$13.82

Fidias G. Arias, Episteme

$9.64

Mario Tamayo y Tamayo, Limusa

$27.60