English Name
Time
Link
Details from Source
Gron
ParlGov
Huber / Inglehart (1995)
RGE
Laver / Hunt
G
Mackie / Rose (1991)
DeGr
PPMD (all)
Ray (1999)
GRONN
NPPSI
TG
added: July 8, 2018, 7:45 p.m. — updated: Dec. 15, 2023, 12:08 p.m.