| Oberliga Nord (1947-63) 1947/1948 - Appearances as Referee |  |
 |
 |
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| 08/02/1948 | Hannover 96 | - | Hamburger SV | 2:5 | - | - | - |
| 18/04/1948 | FC St. Pauli | - | Arminia Hannover | 4:1 | - | - | - |
| Oberliga Nord (1947-63) 1947/1948 - Appearances as Referee | |
|
|
||||
| 08/02/1948 | Hannover 96 | - | Hamburger SV | 2:5 | - | - | - |
| 18/04/1948 | FC St. Pauli | - | Arminia Hannover | 4:1 | - | - | - |
| Complete name: | Janssen |
| Born: | |
| Place of birth: |
Bremen, 
Germany |
| Nationality: |
Germany |