SANS 7931:1985 - Identical

KS C ISO 7931:2015 - Identical

BS 4215-8:1987 - Identical

NFA 82 199:1985 - Equivalent

DS ISO 7931:1992 - Identical

KS C ISO 7931:2001 - Identical

NEN ISO 7931:1992 - Identical

ONORM EN 27931:1992 - Identical

DIN ISO 7931 (1989-08) - Identical

EN 27931:1992 - Identical

NS ISO 7931 Ed. 1 (1992) - Identical

PN EN 27931:2001 - Identical

UNE EN 27931:1993 - Identical

SS EN 27931 Ed. 1 (1992) - Identical

SS ISO 7931 Ed. 2 (1992) - Identical

BS EN 27931:1992 - Equivalent

NBN EN 27931:1992 - Identical

DIN 44765 (1973-10) - Similar

DIN 44763 (1973-10) - Equivalent

I.S. EN 27931:1993 - Identical

NF EN 27931:1992 - Identical

UNI EN 27931:1994 - Equivalent