. "1894Z"^^ . "1917Z"^^ . "1894-02-18Z"^^ . "German Empire" . . . . "Bertrab, Joachim von"@en . "1914Z"^^ . "German flying ace" . . "Leutnant Joachim von Bertrab (died 1922) was a German air ace of the First World War credited with five confirmed victories."@en . . . . "1922Z"^^ . "Joachim von Bertrab"@en . .