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KITLV Demmeni J. Tulp De Haarlem monkey trained to get coconuts with his handler working at Lampung Sumatra .tif nl Een klapperaap baroek aan het werk te Lampoeng Met onderschrift Een Lampongsche klapperaap Sumatra en monkey trained to get coconuts with his handler working at Lampung Sumatra Caption Lampong coconut monkey