Quality phase 101o year decision [source_undated]: consulted source supplies no defensible manifestation year; exact publication year intentionally left unset.
Quality phase 292: The manifestation-own Thimm description identifies a Manual Exercise frontispiece.
Quality phase 483: Thimm confirms the edition statement and engraved manual-exercise frontispiece; no pagination or exact year is supplied.
Digital Witnesses
Thimm bibliography — phase 483 edition 2881
CataloguePDF
Thimm bibliography · open
Research witness linked in quality phase 483 (32-edition terminal batch).
