. . "Manfred Kerth" . . . . "MANFRED" . . "Manfred Kërt" . . "Koerth"@en . "MANFRED KOERTH" . "Kërt" . . "Kerth" . "KOERTH" . "Manfred"@en . "Kërth" . "Manfred Kërth" . "Manfred Koerth"@en .