English Name
Time
Details from Source
NSP
Manifesto Project
ParlGov
Wikipedia
Nusu
EJPR PDY
NUORS
Wikipedia tags
World Values Survey
NUSU
EU-NED
IPOD
YoFiPa
Ray (1999)
YOUNG
NPPSI
YF
added: July 17, 2019, 11:52 p.m. — updated: March 12, 2021, 11:16 a.m.