@misc{Cooper_Joseph_Rock_Constructing,
 author={Cooper, Joseph Rock},
 howpublished={online},
 publisher={The Queen's Printing Office},
 language={eng},
 type={instrukcje},
 title={Constructing Fire-arms, and Plating certain Portions of their Surfaces with Gold, Silver[...]},
 keywords={broń palna, patenty 19w.},
}