Package description and tables for the paper "Fields of definition of   building blocks"
  This document contains additional information for the paper: J. Quer. Fields of definition of building blocks, Math. Comp. 78 (2009), no. 265, pp. 537--554.   It contains a description of the implementation in Magma of the algorithms and computational techniques described in that paper, and also several tables with data that were elaborated using this implementation. 
Jordi Quer
math.NT