Optics and optical instruments - Visual acuity testing - Method of correlating optotypes (ISO 8597:1994, including Technical Corrigendum 1:1995); German version EN ISO 8597:1996— 4 стр.
Optics and optical instruments - Visual acuity testing - Method of correlating optotypes (ISO 8597:1994, including Technical Corrigendum 1:1995); German version EN ISO 8597:1996— 4 стр.