Blair Singer, Aguilar

$7.00

Brian Tracy, Aguilar

$20.00

K. Allen - E. Meyer, Mcgraw Hill

$50.00

L. Blank - Anthony T., Mcgraw Hill

$30.00

F. Mochon - A. Rambla, Mcgraw Hill

$20.00

A. Diaz - V. Aguilera, Mcgraw Hill

$20.00

Berta E. Madrigal Torres, Mcgraw Hill

$30.00

A. Chiang y K. Wainwright, Mcgraw Hill

$46.00

Marco Aurelio Michelli, Ediciones Macchi

$15.00

Andres Augusto Rodriguez

$20.00

Armando J. Gamez Ledezma, Biosfera

$6.79

K. Grichnik - C. Winkler, Mcgraw Hill

$20.00