Provenance des données
Sources officielles
Le bureau central des statistiques de Lettonie effectue des enquêtes et des recensements périodiques [Results of the 2000 population and housing census in Latvia - collection of statistical data. (...)
Enquêtes
Ringolds BALODIS (Ed.), State and Church in the Baltic States, 2001, Latvian Association for Freedom of Religion, 2001.
US State department annual International Religious Freedom Report (...)