It is strongly biased towards the author's speciality of galaxy morphology, and particularly to bars and rings. To be fair, these are often given
Cosmic Pinwheels: Spiral Galaxies And The Universe
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Galaxy Morphology - Ronald J. Buta
Galaxy Morphology
Cosmic Pinwheels: Spiral Galaxies And The Universe - By Ronald J Buta (paperback) : Target
Extragalactica PDF, PDF, Astronomía Extragaláctica
Galaxy Morphology - Ronald J. Buta
Cosmic Pinwheels: Spiral Galaxies And The Universe - By Ronald J Buta (paperback) : Target
Galaxy Morphology - Ronald J. Buta
Galaxy Ring Classification » Talk — Zooniverse
Astronomía Extragaláctica
Galaxy Morphology - Ronald J. Buta
Ronald J. Buta: Books