@book{15722,
	author = {International Astronomical Union Symposium and Dopita, M., ed. and Astronomical Society of the Pacific },
	title = {Planetary nebulae-their evolution and role in the universe},
	publisher = {Astronomical Society of the Pacific},
	year = {2003},
	series = {IAU symposium; no. 209},
	address = {San Francisco}
}