@book{151573,
	author = {Calder, Nigel.},
	title = {Comets},
	publisher = {Dover},
	year = {1994.},
	address = {New York},
	note = {Originally published: The comet is coming. Harmondsworth, Middlesex, England ; New York, N.Y., U.S.A. : Penguin Books, 1992, c1980.}
}