@misc{Gaj_Jerzy_Ideas,,
 author={Gaj, Jerzy},
 copyright={Akademia Wychowania Fizycznego w Poznaniu},
 howpublished={online},
 publisher={Akademia Wychowania Fizycznego w Poznaniu},
 language={eng},
 type={artykuł},
 title={Ideas, Conditions and Effects of Institutional Activity in the Physical Culture of Poland (1919-1939)},
}