Popper – Ibn Taghrī Birdī, an-Nujūm az-zāhira, UCPSP 3.1 (1913)
publicnone1 text · layers: L0 witness
Licence: public domain in Canada (author died ≤ 1971, verified; LICENCES.md §7) — US position (recorded, does not gate the class; PD-CA 2026-09-26): PD-US (published ≤1930)
Attribution (first text; each text prints its own): Popper – Ibn Taghrī Birdī, an-Nujūm az-zāhira, UCPSP 3.1 (1913); public domain in Canada (death year verified: Popper d.1963 (https://www.wikidata.org/wiki/Q42302290 d. 1963-06-03; LC heading "Popper, William, 1874-1963" in https://archive.org/metadata/parallelisminisa00popprich) — staged at corpus/incoming/histories/historians/ibn-taghribirdi-nujum/popper-nujum-ucpsp-3-1-1913.pdf from https://archive.org/details/ablmahsinibntag00poppgoog (HIST-1, 2026-09-29)); OCR text by the Kemetic project, Yousef Hanna 2026.
Jurisdiction note: this text is public domain under Canadian law (the project is published from Canada; LICENCES.md §7: author died in or before 1971). It may still be in copyright elsewhere — in countries with a life + 70 term, or where a later edition claims its own rights. The licence line above says what was verified. If you are outside Canada, check your own law before re-using it.