In 1930, Czechia had 8.3 million inhabitants: 78.5% Catholics, 10% Protestants (Hussites and Czech Brethren) and 7.8% irreligious or undeclared citizens. "Population by religious belief and sex by 1921, 1930, 1950, 1991, 2001 and 2011 censuses 1)" (dalam bahasa Czech and English). Czech Statistical Office. Diarsipkan dari versi asli tanggal 17 January 2017. Diakses tanggal 2 January 2017.Pemeliharaan CS1: Bahasa yang tidak diketahui (link)
In 1930, Czechia had 8.3 million inhabitants: 78.5% Catholics, 10% Protestants (Hussites and Czech Brethren) and 7.8% irreligious or undeclared citizens. "Population by religious belief and sex by 1921, 1930, 1950, 1991, 2001 and 2011 censuses 1)" (dalam bahasa Czech and English). Czech Statistical Office. Diarsipkan dari versi asli tanggal 17 January 2017. Diakses tanggal 2 January 2017.Pemeliharaan CS1: Bahasa yang tidak diketahui (link)