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Practical Object-Oriented Design in Ruby: An Agile Primer (Addison-Wesley Professional Ruby) (Addison-Wesley Professional Ruby Series): Amazon.co.uk: Metz, Sandi: 8601405619877: Books
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Practical Object-Oriented Design: An Agile Primer Using Ruby: Amazon.co.uk: Metz, Sandi: 9780134456478: Books
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Book Review]Practical Object-Oriented Design: An Agile Primer Using Ruby by Sandi Metz - DEV Community
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Practical Object-Oriented Design in Ruby - Panel - Sandi Metz, Joe Leo, Justin Shultz, Li-Hsuan Lung - YouTube
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Practical Object-Oriented Design: An Agile Primer Using Ruby: Amazon.co.uk: Metz, Sandi: 9780134456478: Books
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