English Name
Time
Details from Source
DP
Manifesto Project
ParlGov
Wikipedia
EJPR PDY
Wikipedia tags
PolCon
PrDe
EU-NED
DEMPROL
IPOD
Laver / Hunt
Mackie / Rose (1991)
AvOp
MAPP
PIP
PPMD (all)
Ray (1999)
TAP
NPPSI
PD
added: Feb. 14, 2019, 2:15 p.m. — updated: March 12, 2021, 11:15 a.m.