Arturo Serrano Santayo, Prentice Hall

$1.00

$0.14

$1.00

James Nilsson - Susan R., Addison-wesley Iberoameri

$7.00

Ivan Loscher, Debate

$1.05

El Nacional, el Nacional

$2.31

El Nacional, el Nacional

$3.00

Brujula Escolar, el Nacional

$0.35

M. L. Dalla - G. Toraldo, Critica

$1.00

J. Hall - G. Schmidt, Mcgraw Hill

$5.00

Boris Muños, Debate

$5.00

$1.00

$1.00

Rodriguez, Rosaura, Grijalbo

$4.05

$1.00