ISO 1073-1:1976/Cor 1:1979 Optical recognition of alphanumeric character sets Part 1: Character set OCR-A Shape and size of printed images Technical Corrigendum 1
1970ISO 1073-1:1976/Cor 1:1979 Optical recognition of alphanumeric character sets Part 1: Character set OCR-A Shape and size of printed images Technical Corrigendum 1
1976ISO 1073-1:1976/Amd 1:1978 Alphanumeric character sets for optical recognition; Part 1: Character set OCR-A; Shapes and dimensions of the printed image
1976ISO 1073-1:1976 Alphanumeric character sets for optical recognition; Part 1: Character set OCR-A; Shapes and dimensions of the printed image