There has been data ("Twoja firma w Google, czyli jak skutecznie pozycjonowaÄ stronÄ www - Damian SaĹkowski [KSIÄĹťKA]") available for this ISBN from the data sources that books-by-isbn.com uses, but not on the latest request on Tue Jan 14 10:29:00 2020, so the data displayed here has been removed .