| type of event | citation |
| source | Email MR2603 |
| to whom (or to what) is related to x12 | [private] [private] [private] [private] [private] Dorota Pietrzkiewicz née Delangiewicz Lesław Pietrzkiewicz Zofia Pietrzkiewicz Barbara Pietrzkiewicz [private] [private] [private] |