English Name
Time
Details from Source
CD
Manifesto Project
Ce
ParlGov
Wikipedia
CHES
CLEA
EJPR PDY
Wikipedia tags
Huber / Inglehart (1995)
EU-NED
IPOD
CeDe
Mudde (2007)
NPED
PIP
PPMD (all)
Ray (1999)
TAP
The PopuList
PPEPE (2021)
NPPSI
added: Jan. 31, 2013, 10:28 a.m. — updated: March 12, 2021, 11:15 a.m.