'Quotations about Sumatra'
Elephants in Aceh
Plantations and Medan
The Voyage of Harm Kamerlingh Onnes
Pematang Siantar
The region around Lake toba
Sibolga, the old harbourtown
Padang city
The Fort of Bengkulu
'The Chinese Commercial Elite of Medan 1890-1942:
'The Penang Connection'
in: Journal of the Malaysian Branch of the Royal Asiatic Society . No. 297 Dec. 2009.
