Robuta

https://en.wikipedia.org/wiki/Category:1927_establishments_in_French_Indochina

https://en.wikipedia.org/wiki/Category:1929_establishments_in_French_Indochina

https://en.wikipedia.org/wiki/Category:1923_in_French_Indochina

https://en.wikipedia.org/wiki/Category:1953_establishments_in_French_Indochina

https://www.liveauctioneers.com/price-result/indochinasiam-with-british-and-french-spheres-burma-cambodia-anam-1899-map/