モナコの歴史
“Monaco”, The Encyclopaedia Britannica (11th ed.), New York: Encyclopaedia Britannica, (1910), OCLC 14782424, https://archive.org/details/encyclopaediabri18chisrich/page/684/mode/2up?view=theater
“Monaco”, Southern France, including Corsica (6th ed.), Leipzig: Baedeker, (1914), https://archive.org/stream/southernfrancein00karl#page/584/mode/2up