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Archives I presume?
Rubber was predominantly exploited in the Crown domain by the concessionaires Abir and Anversoise using forced labour. The indigenous population suffered greatly under the regime of exploitation. According to some estimates, the population declined by up to 60%. Map indicating the number of tons of harvested rubber per district, 1905.
NAB, Archives NAB, Archives Hubert Droogmans, no. 44.
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