2017BS EN ISO 1660:2017 Geometrical product specifications (GPS). Geometrical tolerancing. Profile tolerancing
2000BS ISO 128-22:2000 Technical drawings - General principles of presentation - Basic conventions and applications for leader lines and reference lines
2000BS ISO 128-22:1999 Technical drawings - General principles of presentation - Basic conventions and applications for leader lines and reference lines
1996BS EN ISO 1660:1996 Technical drawings - Dimensioning and tolerancing of profiles
1995BS EN ISO 7083:1995 Technical drawings - Symbols for geometrical tolerancing - Proportions and dimensions