@misc{_Black,
 howpublished={online},
 publisher={Clare Bernthal},
 type={postcard},
 title={Black and white postcard "Baltic seaside resort Sopot. Villa of the Crown Prince", uncirculated},
 title={Pocztówka czarno-biała „Ostseebad Zoppot. Kronprinzen-Villa", nieobiegowa},
 keywords={Postcard, Grafic desing, Museum collections, Sopot Museum},
}