$8.40

Burke A. Cunha, Mcgraw Hill

$30.00

Esp. y Mgs. Aura M. Parra, Luz

$8.30

D. Fitzgibbon - J. Loeser, Lippincott

$150.00

Fernando Guzman Toro, Vadell Hermanos

$14.40

Bezares, Mcgraw Hill

$36.00

Leonard Crowley, Mcgraw Hill

$68.40

S. Joo - A. Kau, Lippincott

$69.12

A. Herrera - M. Granados, Mcgraw Hill

$61.89

Curtis M. Rimmerman, Lippincott

$75.60

Cassimeris

$102.00

Kasper - Braunwald y Otro, Mcgraw Hill

$185.22

R. Walls - M. Murphy, Lippincott

$50.58

D. Cline - O. Ma -, Mcgraw Hill

$134.40

T. Browne - G. Holmes, Lippincott

$60.00