@misc{Balzer_Oswald_Marian_(1858-1933)_The_1941,
 author={Balzer, Oswald Marian (1858-1933)},
 address={London},
 howpublished={online},
 year={1941},
 publisher={Polish Ministry of Information},
 language={eng},
 type={książka},
 title={The anniversary of the Battle of Grunwald},
 keywords={Grunwald, Bitwa (1410) - rocznice},
}