(1999). Spring tour to South Germany: German fortifications from the 16th to 20th century in Baden-Württemberg, Bavaria, Rhineland-Palatinate and North Rhine, Westfalia ; saturday, May 15 to saturday, May 22, 1999 ; guide book. <<H.-R.>> Neumann.
Chicago-Zitierstil (17. Ausg.)Spring Tour to South Germany: German Fortifications from the 16th to 20th Century in Baden-Württemberg, Bavaria, Rhineland-Palatinate and North Rhine, Westfalia ; Saturday, May 15 to Saturday, May 22, 1999 ; Guide Book. Berlin, Cauerstraße 19a: <<H.-R.>> Neumann, 1999.
MLA-Zitierstil (9. Ausg.)Spring Tour to South Germany: German Fortifications from the 16th to 20th Century in Baden-Württemberg, Bavaria, Rhineland-Palatinate and North Rhine, Westfalia ; Saturday, May 15 to Saturday, May 22, 1999 ; Guide Book. <<H.-R.>> Neumann, 1999.