<http://cidinhadasilva.blogspot.com/2007/12/projeto-de-lei-para-distribuir-livros.html>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://cidinhadasilva.blogspot.com/2007/12/projeto-de-lei-para-distribuir-livros.html>