Reading Assignments, and other reference material.
Primary : EA&C p89-90; p98-100; B&M p145-157; p157-161.
Secondary : S&G p32-36.
Additional :
NED has an
excellent overview of galaxy classification, with many examples.
"Galaxy Morphology and Classification" by van den Bergh (CUP: 1998)
EAA : "Galaxies : Classification" by Ron Buta.
EAA : "Galaxy Morphology-Density Relation" by Warrick Couch.
EAA : "Peculiar Galaxies" by James Higdon.
Other References :
Hubble's original papers
Hubble E (1926) Extra-galactic nebulae Astrophys. J. 64 321-69
Hubble E (1936) The Realm of the Nebulae reprinted 1958 New York: Dover
de Vaucouleurs revision
de Vaucouleurs G (1959) Classification and morphology of external
galaxies Handbuch der Physik 53 275
Sandage revisions and reviews
Sandage A (1961) The Hubble Atlas of Galaxies
Sandage A (1975) in Galaxies and the Universe (Stars and Stellar Systems
vol IX), U.Chicago Press.
Sandage A and Bedke J (1994) The Carnegie Atlas of Galaxies
Luminosity Classes of van den Bergh
van den Bergh S (1960) A preliminary luminosity classification of
late-type galaxies Astrophys. J. 131 215-23
Sandage A and Tammann G (1987) A Revised Shapley-Ames
Catalog of Bright Galaxies
The 'Yerkes' system
Morgan W W (1958) A preliminary classification of the forms of
galaxies according to their stellar population Publ. Astron. Soc. Pac.
70 364-91
Arm Classification of Elmergreens
Elmegreen D and Elmegreen B (1987) Arm classifications for spiral
galaxies Astrophys. J. 314 3-9
Other reviews of certain unusual galaxy types
Buta R and Combes F (1996) Galactic rings Fundam. Cosm. Phys.
17 95-281
Appleton P N and Struck-Marcell C (1996) Collisional ring galaxies
Fundam. Cosm. Phys. 16 111-220
Whitmore B C et al (1990) New observations and a photographic
atlas of polar-ring galaxies Astron. J. 100 1489-522