@misc{Polski_Rejestr_Statków_Rules,
 author={Polski Rejestr Statków},
 howpublished={online},
 publisher={Polski Rejestr Statków},
 language={eng},
 title={Rules for the classification and construction of sea-going ships : temporary amendments to Part 1, Classification regulations : July 2021},
 type={e-książka},
 keywords={statki, klasyfikacja, akty prawne},
}