2002UNE-EN ISO 9241-1/A1:2002 Ergonomic requirements for office work with visual display terminals (VDTs) - Part 1: General introduction. (ISO 9241-1:1997/AM 1:2001)
1997UNE-EN ISO 9241-1:1997 ERGONOMIC REQUIREMENTS FOR OFFICE WORK WITH VISUAL DISPLAY TERMINALS (VDTS). PART 1: GENERAL INTRODUCTION. (ISO 9241-1:1997).