- Von rechts,
Ahmad al-Barāq,
Ahmed al-
Hoursch, Aḥmad Muḥammad Nuʿmān,
Prinz Saif al-Haq Ibrahim,
Muhyiddin al-Ansi,
Muhammad Mahmoud al-Zubayri....
- 33433066588363 G.
Holscher (1900), "Bonn",
Guide to the
Rhine (3rd ed.), Cologne:
Hoursch & Bechstedt, OCLC 8672751 "Bonn" . Encyclopædia Britannica. Vol. 4 (11th ed...
- Bauprobleme. Gürzenich, Heumarkt,
Neubau d. Kölner Rathauses, Dom-Umbauung.
Hoursch & Bechstedt, Köln 1924. Neue Stadtbaukunst. Leipzig.
Friedrich Ernst Hübsch...
- OCLC 8395555 G.
Holscher (1900), "Düsseldorf", A
Guide to the Rhine, Cologne:
Hoursch & Bechstedt, OCLC 8672751 "Düsseldorf" . Encyclopædia Britannica. Vol. 8...
