@inbook {636,
	title = {A rich algal micro-flora from the Lower Permian of Jambi Province},
	booktitle = {The Pre-Tertiary Fossils of Sumatra and their Environments},
	series = {CCOP Technical papers},
	volume = {19},
	year = {1989},
	pages = {59-69},
	publisher = {United Nations},
	organization = {United Nations},
	address = {Bangkok},
	author = {Vachard, D.},
	editor = {Fontaine, H. and Gafoer, S.}
}
