@inbook {7437,
	title = {Late Precambrian and early Cambrian Metazoa: preservational or real extinctions?},
	booktitle = {Patterns of change in earth evolution},
	year = {1984},
	pages = {159-168},
	publisher = {Springer-Verlag},
	organization = {Springer-Verlag},
	address = {Berlin, Heidelberg, New York, Tokyo},
	keywords = {ediacara, evolution, metazoa},
	author = {Seilacher, Adolf},
	editor = {Holland, H. D. and Trendall, A. F.}
}
