Prowe-Egger (Egger 1914)Brüder Egger, auktion XLVI, Sammlung des Herrn Theodor Prowe, Moskau, and aus anderem Besitz, Wein, 11 Mai 1914. Brüder Egger, auction XLVI, Collection of Mr. Theodor Prowe, Moscow, and other holdings, Vienna, 11 May 1914. Available online: https://ia800309.us.archive.org/10/items/ProweIIIEgger1914/Prowe_III_Egger_1914.pdf | Prowe-Egger (Egger 1914)Brüder Egger, auktion XLVI, Sammlung des Herrn Theodor Prowe, Moskau [part 3], and aus anderem Besitz, Wein, 11 Mai 1914. Brüder Egger, auction XLVI, Collection of Mr. Theodor Prowe, Moscow [part 3], and other holdings, Vienna, 11 May 1914. Available online: https://ia800309.us.archive.org/10/items/ProweIIIEgger1914/Prowe_III_Egger_1914.pdf |