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BSI BS 4636-3: English -- Punched Cards Part 3: Representation of 7-Bit and 8-Bit Coded Character Sets on 12- Row Punched Cards
French -- Cartes perforees. Representation des jeux de caractères codes à 7 elements et à 8 ele
Abstract: Card hole patterns assigned to the bit combinations of 7-bit and 8-bit codes.