(Q39053367)
Statements
2 references
9 September 2017
9 September 2017
1933
3 references
Helmut Pfeuffer
9 October 2017
Helmut Pfeuffer
9 October 2017
1 reference
8 August 2021
9 May 2022
1 reference
28 September 2020
Identifiers
1 reference
Helmut Pfeuffer
4 July 2020