Gustave-Claude-Etienne Courtois
[ca] Gustave Courtois
[de] Gustave Courtois
[fr] Gustave Courtois
[id] Gustave Courtois
[it] Gustave Courtois
[ja] ギュスターヴ＝クロード＝エティエンヌ・クルトワ
[ru] Куртуа, Гюстав
[sv] Gustave Courtois