@book{9402,
	author = {Volker, Tys,},
	title = {From primeval forest to cultivation ;},
	publisher = {The Deli Planters' Association and The General Association of Rubberplanters on the east-coast of Sumatra,},
	year = {[1928].},
	address = {[Medan?] :},
	note = {Includes index.}
}