http://www.google.co.jp/search?hl=ja&rlz=1G1GGLQ_JAJP260&q=google+yahoo+msn&aq=1e&aqi=g-e8g1g-e1&aql=&oq=google+yahoo&gs_rfai=altgolddesuの日記：：http://d.hatena.ne.jp/altgolddesu/20100727/1280233939

http://manholemap.juge.me/ https://www.ibm.com/developerworks/mydeveloperworks/blogs/pgmrk/entry/_E3_83_9E_E3_83_B3_E3_83_9B_E3_83_BC_E3_83_AB_E3_83_9E_E3_83_83_E3_83_9717?lang=ja