DIN 15551-3
DIN 15551-3 Radiation sensitive films - Cellulose nitrate film - Part 3: Terms and definitions, properties, utilization, storage
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 12/01/2013
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 12/01/2013