@misc{_Drzwi,
 howpublished={online},
 publisher={Instytut Techniki Budowlanej},
 language={pol},
 type={e-książka},
 title={Drzwi wewnętrzne GERDA S Premium, GERDA SX-10 Premium, GERDA C Premium, GERDA C1 Premium, GERDA C2 Premium, GERDA CT Premium, GERDA C1T Premium, GERDA C2T Premium, GERDA CX-10 Premium, GERDA C1X-10 Premium, GERDA C2X-10 Premium, GERDA W Premium, GERDA WD Premium, GERDA WT Premium, GERDA WDT Premium, GERDA WX-10 Premium, GERDA W1X-10 Premium},
 keywords={drzwi, stolarka budowlana, normy},
}