* ISBN Link
,amazon,http://www.amazon.co.jp/exec/obidos/ASIN/#{isbn2}#{aid}/ref=nosim/
,紀伊國屋,http://bookweb.kinokuniya.co.jp/guest/cgi-bin/wshosea.cgi?W-ISBN=#{isbn2}
,旭屋,http://www.netdirect.co.jp/search/ISSSchDetail.asp?ISBN=#{isbn2}
,楽天,http://bsearch.rakuten.co.jp/Btitles?KEY=#{isbn2}
,世田谷区,http://libweb.city.setagaya.tokyo.jp/clis/search?ISBN=#{isbn2}
,i,http://libweb.city.setagaya.tokyo.jp/clis/searchi?ISBN=#{isbn2}
,.,http://libweb.city.setagaya.tokyo.jp/i/