Roberto Arenas, Mcgraw Hill

$62.40

Joseph E. Muscolino, Lippincott

$69.60

Francisco A. Orduña P., Diaz de Santos

$36.00

O. Quiros - J. Quiros, Amolca

$50.40

Patrick W. Tank, Lippincott

$42.00

Schwartz y Otros, Mcgraw Hill

$62.40

Jose Saban Ruiz, Diaz de Santos

$96.00

E. Mayeaux - J. Cox, Lippincott

$170.40

Linda E. Muños Espinosa, Mcgraw Hill

$144.00

R. Walls - M. Murphy, Lippincott

$50.58

Alexandro Bonifaz, Mcgraw Hill

$60.00

Carlos A. Roldan, Lippincott

$135.60

C. Braun - C. Anderson, Lippincott

$114.00

R. Zane - J. Kosowsky, Lippincott

$55.20

Cassimeris

$102.00