| LC control no. | n 99262069 |
|---|---|
| Personal name heading | Siemowit IV, książę, approximately 1352-1425 or 1426 |
| Variant(s) | Siemowit IV, książę, ca. 1352-1425 or 6 Ziemowit IV, książę, approximately 1352-1425 or 1426 |
| Birth date | 1352~ |
| Death date | [1425,1426] |
| Special note | THIS 1XX FIELD CANNOT BE USED UNDER RDA UNTIL THIS RECORD HAS BEEN REVIEWED AND/OR UPDATED |
| Found in | Supruniuk, Anna. Otoczenie księcia mazowieckiego Siemowita IV--1374-1426, 1998. Nowa enc. pow. PWN, c1996: v. 5, p. 834 (Siemowit IV, Ziemowit; b. ca. 1352; d. 1425 or 26; książę) |
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