ISO 5799:1981 Photography — Direct-exposure medical and dental radiographic film/process combinations — Determination of ISO speed and average gradient
1991ISO 5799:1991 Photography; direct-exposing medical and dental radiographic film/process systems; determination of ISO speed and ISO average gradient
1981ISO 5799:1981 Photography — Direct-exposure medical and dental radiographic film/process combinations — Determination of ISO speed and average gradient