Pagina 28 en 29 van Fotoboek van de Algemeene Vereeniging van Rubberplanters ter Oostkust van Sumatra ().Two book pages with links A photo of V. RIS, first president of the general Association of Rubber Plants in East Coast of Sumatra (). And on the right information about the Risfonds named after him. Part of photo album of the general union of rubber planters on the east coast of Sumatra ().

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Photo credit: © BTEU/RKM / Alamy / Afripics
License: Licensed
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