antonio inserted p_nbsp_br_p__6.html into layout  about 8 years ago

Commit id: ad2d18857a8869fed71741acca3b4a951edbffc0

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p_nbsp_br_p__4.html  p_nbsp_br_p__5.html  p_b_MATERIALES_Y_METODOS__.html  p_nbsp_br_p__6.html