# Notice and attribution

Source collection: https://rock.pollub.pl/collections/a42db069-319d-4d51-88d1-490ee7e6bad8
Publisher policy: https://wpl.pollub.pl/pl/i/Polityka-publikacyjna/20

The eight retained books expose `CC-BY-SA-4.0` in both the item record and the metadata of the matched original PDF bitstream. Per-record authors, titles, source URLs, license evidence and source-file checksums are preserved in `artifacts/attribution.jsonl` and `artifacts/inventory.json`.

Transformations: PDF text extraction with pdfplumber, Unicode and whitespace normalization, page-number-only removal, line-wrap repair, limited email and labelled-phone redaction, and within-source exact/near deduplication. Images are excluded. Isolated unreadable PDF glyphs are represented as `[UNREADABLE_GLYPH]`. Attribution and ShareAlike obligations remain applicable.