J. Fuente - G. Heinze, Mcgraw Hill

$30.00

R. Zane - J. Kosowsky, Lippincott

$55.20

R. Baldor - A. Ehrlich, Lippincott

$156.00

Thomas M. de Fer, Lippincott

$93.60

E. Mayeaux - J. Cox, Lippincott

$170.40

Julio Sepulveda Saavedra, Mcgraw Hill

$108.00

F.j. Blanco - J.d. Cañete, Panamericana

$46.80

Carlos A. Roldan, Lippincott

$135.60

Patrick W. Tank, Lippincott

$42.00

Alexandro Bonifaz, Mcgraw Hill

$60.00

Francisco A. Orduña P., Diaz de Santos

$36.00

J. Romero - G. Tena, Mcgraw Hill

$48.00

Trujillo - Becerra- Rivas, Mcgraw Hill

$111.48

Mario A. Hernandez O., Mcgraw Hill

$39.60

I. Martin - Lacave, Diaz de Santos

$72.00