1
Published: 1959
Superior document: Marburger geographische Schriften 11
2
Published: 1982
Superior document: Wissenschaftliche Länderkunden 21
3
Published: 1968
Superior document: Göttinger geographische Abhandlungen 46
4
Published: 1977
Superior document: Erlanger geographische Arbeiten : Sonderband 5
5
6
Published: 1997