found:Work cat.: Hodge, P.W. Andromeda Galaxy, 1992(M31)
found:Gloss. astro. astrophysics(Andromeda galaxy (M31, NGC224; a spiral galaxy))
found:McGraw-Hill dict. sci. tech.(Andromeda Galaxy, also known as Andromeda Nebula)
found:Acad. Am. ency.:v. 1, p. 409 (Andromeda galaxy: It is sometimes erroneously referred to as the Andromeda Nebula because it was believed to be a nebula when first discovered.)
found:Guinness book astron.(Andromeda Spiral)
found:Britannica Micro.:v. 1, p. 364+ (Andromeda Nebula, NGC224, M31; the galaxy is known as M31 in the classification per Charles Messier)
found:NASA(Andromeda galaxies)
found:Ency. astro.
found:Dict. astro. space atmos. phen.
found:Facts file dict. astron.
found:Encyc. astro. astrophysics.
found:Random House.
