2007NF S91-255:2007 Dentistry - Metallic materials for fixed and removable restorations and appliances.
0000 NF S91-218:2000
1995NF S91-218:1995 DENTAL CASTING ALLOYS WITH NOBLE METAL CONTENT OF 25 PER CENT UP TO BUT NOT INCLUDING 75 PER CENT. (EUROPEAN STANDARD EN ISO 8891).