@Book{481535101,
author="Osterbrock, Donald E.
and Ferland, Gary J.",
title="Astrophysics of gaseous nebulae and active galactic nuclei",
year="2006",
edition="Second edition",
publisher="University Science Books",
address="Mill Valley, California",
keywords="Nebulae; Galactic nuclei; Astrophysics",
note="Donald E. Osterbrock (Lick Observatory, University of California, Santa Cruz) ; Gary J. Ferland (Department of Physics and Astronomy, University of Kentucky)",
note="Bibliographical references",
isbn="1891389343",
language="English"
}