'Raamatukoi' => 'http://www.raamatukoi.ee/cgi-bin/index?valik=otsing&paring=$1',
'AddALL' => 'http://www.addall.com/New/Partner.cgi?query=$1&type=ISBN',
'Barnes & Noble' => 'http://search.barnesandnoble.com/bookSearch/isbnInquiry.asp?isbn=$1',
'Raamatukoi' => 'http://www.raamatukoi.ee/cgi-bin/index?valik=otsing&paring=$1',
'AddALL' => 'http://www.addall.com/New/Partner.cgi?query=$1&type=ISBN',
'Barnes & Noble' => 'http://search.barnesandnoble.com/bookSearch/isbnInquiry.asp?isbn=$1',