Guglielmo Piani (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Guglielmo Piani" in English language version.

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Andes, Stephen J.C. (2014). The Vatican and Catholic Activism in Mexico and Chile: The Politics of Transnational Catholicism, 1920-1940. Oxford University Press. p. 168. Retrieved 19 May 2020.
"Europe". Catholic Missions: 167. July 1922. Retrieved 19 May 2020.
Pollard, John (2014). The Papacy in the Age of Totalitarianism, 1914-1958. Oxford University Press. Retrieved 19 May 2020.^{[page needed]}
De Marchi, Giuseppe (1957). Le nunziature apostoliche dal 1800 al 1956 (in Italian). Ed. di Storia e Letteratura. p. 173.

Slawson, Douglas J. (1994). "The National Catholic Welfare Conference and the Mexican Church-State Conflict of the Mid-1930s: A Case of Déjà Vu". The Catholic Historical Review. 80 (1): 58–96, esp. 92-93. JSTOR 25024204.

Acta Apostolicae Sedis (PDF). Vol. XIII. 1921. p. 560. Retrieved 18 May 2020.
Acta Apostolicae Sedis (PDF). Vol. XIV. 1922. pp. 195, 616. Retrieved 18 May 2020.
"Firmissimam Constantiam, Encyclical of Pope Pius XI on the Religious Situation in Mexico". Libreria Editrice Vaticana. 28 March 1937. Retrieved 19 May 2020.
Acta Apostolicae Sedis (PDF). Vol. XLIV. 1952. p. 16. Retrieved 18 January 2020.
Acta Apostolicae Sedis (PDF). Vol. XLVIII. 1956. p. 740. Retrieved 19 May 2020. Delegato Apostolico nel Messico