István Friedrich (Portuguese Wikipedia)

Analysis of information sources in references of the Wikipedia article "István Friedrich" in Portuguese language version.

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Slavic Review (em inglês). Pittsburgh: American Association for the Advancement of Slavic Studies. 1976. p. 270
Siklos, Andras; Siklós, András (1988). Revolution in Hungary and the Dissolution of the Multinational State, 1918 (em inglês). Budapeste: Kultura Hungarian. p. 92

Herbermann, Charles George (1951). The Catholic Encyclopedia: Supplement. I- (em inglês). Nova Iorque: Encyclopedia Press, Incorporated. RUMANIAN Occupation. — Peidl's Socialist government was without popular support and was swept away, 7 August, 1919, by counterrevolutionaries led by Istvan Friedrich, Károlyi's active follower of a year before.