@misc{Kossak_Ernst_(1839–1902)_Die_1872,
 author={Kossak, Ernst (1839–1902)},
 copyright={Public Domain},
 address={Berlin},
 howpublished={online},
 year={1872},
 publisher={Nicolai'sche Verlagsbuchhandlung (A. Effert & L. Lindtner)},
 language={ger},
 type={Text},
 title={Die Elemente der Arithmetik : (Programmabhan[d]lung des Werderschen Gymnasiums in Berlin)},
 URL={http://www.rcin.org.pl/Content/14939/PDF/WA35_18285_6713_Die-Elemente.pdf},
}