@book{139077,
	author = {Billingham, John. and Ames Research Center and Conference on Life in the Universe},
	title = {Life in the universe},
	publisher = {MIT Press},
	year = {1982.},
	address = {Cambridge, Mass.},
	note = {Proceedings of the Conference on Life in the Universe, held at NASA Ames Research Center, June 19-20, 1979.}
}