“...Museum of the History of the Don Cossacks...”

“...Museum of the History of Riga and Navigation = Das Rigaer Geschichts- und Schiffahrtsmuseum...”

“...Museum of the History of Riga and Navigation = Das Rigaer Geschichts- und Schiffahrtsmuseum...”

“... wissenschaftlicher Werke = Questions of German history : historical researches...”