From primeval forest to cultivation ; A sketch of the importance of the tobacco, other cultivations and the industry of the east coast of Sumatra - Volker, Tys, 1892- ([Medan?] : The Deli Planters' Association and The General Association of Rubberplanters on the east-coast of Sumatra, 1928)
Includes index.
Keywords: Sumatra (Indonesia) -- Economic conditions; Tobacco -- Indonesia -- Sumatra; Agriculture -- Indonesia -- Sumatra