[Dr. Hubert Schumann--60 years].
R
R
Ribbeck
P
P
Müller
G
G
Hartwich
D001634:Bibliographies as Topic; D004772:Entomology / Q000266:history; D005859:Germany, East; D049673:History, 20th Century
Dr. rer. nat. Hubert Schumann--60 years.