00294nam a2200097 a 450000500170000000800410001702000180005810000220007624500560009826000420015420260706151150.0160315s2007^^^^^^^^^^^^^^^^^^000^^^spa^d  a9781407518756  aWilliams, Michael 0aTractores :bMás de 220 modelos de todo el mundo.  aBarcelona :bParragon Books,c©2007.