@misc{Baxter_Frank_Improvements,
 author={Baxter, Frank and Tyrrell-Smyth, Aubbrey Tyrrel and White, Robert},
 howpublished={online},
 publisher={Courier Press},
 language={eng},
 title={Improvements relating to advertising devices : patent specification : provisional specification 483,909},
 type={opis patentowy},
 keywords={drukarstwo, maszyny drukarskie, patenty, urządzenia reklamowe},
}