Film 16 mm; optical sound heads, requirements and general data for measuringFilm 16 mm; lecteur de son optique pour film 16 mm, indications générales pour le mesuragé
DIN 15666:1981 history
1981DIN 15666:1981-05 Film 16 mm; optical sound heads, requirements and general data for measuring
1981DIN 15666:1981 Film 16 mm; optical sound heads, requirements and general data for measuring