https://www.sparkfun.com/news/3125#comment-5e43d9231f12b126757c1b74
https://www.sparkfun.com/news/3120#comment-5e43d96022a3842ce2502204
https://blogs.elpais.com/metroscopia/2014/10/social-liberalismo.html
https://blogs.elpais.com/metroscopia/2014/12/barometro-electoral-diciembre-2014.html
https://blogs.elpais.com/metroscopia/2015/04/el-bipartidismo-tocado-pero-no-hundido.html
https://blogs.elpais.com/metroscopia/2015/02/elecciones-2015-la-izquierda-tendr%C3%A1-la-llave-del-triunfo.html
https://blogs.elpais.com/metroscopia/2015/05/sondeo-preelectoral-en-el-municipio-de-madrid.html
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