@misc{_Black,
 howpublished={online},
 type={postcard},
 title={Black and white postcard "Baltic resort Sopot. Spa House. Guest House"},
 title={Pocztówka czarno-biala "Ostseebad Zoppot. Kurhaus. Logierhaus"},
 keywords={Postcard, Grafic desing, Museum collections, Sopot Museum},
}