Name | Role | Place | Source | |
---|---|---|---|---|
C. Opitz-Bilderbeek | Registered | 's-Gravenhage | Management file | |
E. Lehmann-Opitz | Registered | 's-Gravenhage | Management file | |
H.E. Opitz | Registered | 's-Gravenhage | Management file | |
H.H.J. Opitz | Registered | 's-Gravenhage | Management file | |
M. Opitz | Registered | 's-Gravenhage | Management file |
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