@book{89166,
	author = {Kraëff, A.},
	title = {Sumbangan untuk pengetahuan efusiva dan instrusiva muda dari daerah-aliran Sungai Kajan (Kalimantan Timur-Laut). A contribution to the petrology of the young extrusive and instrusive rocks of the river-basin of S. Kajan (N.E. Borneo)},
	publisher = {Djawatan Geologi,},
	year = {1955.},
	series = {Indonesia. Djawatan Geologi. Publikasi keilmuan, seri petrologi nr. 29},
	address = {Bandung, Republik Indonesia,},
	note = {In Indonesian and English.}
}