7 Puentes y conectores....................................................................................... 116
9 Obtención de ayuda.........................................................................................125
............................................................................................. 107
....................................................................................111
...........................................................................................111
......................................................................................................................... 112
........................................................................................................................ 113
............................................................................................................. 113
....................................................................................................................... 113
......................................................................................116
............................................................................................................. 117
......................................................................................118
.............................................................................................. 125
............................................................................................ 125
........................................................................................................ 125
..................................................................... 105
.........................................................................106
.........................................................................107
...................................................................108
.............................................................................. 109
................................................................... 109
........................................................................... 110
............................................................. 112
...............................................................................114
.......................................................... 114
................................................................................. 115
......................................................................... 125
....................................... 114
.................115