Design Patterns: Elements of Reusable Object-Oriented Software: Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides, Grady Booch: 8601419047741: Amazon.com: Books
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Design Patterns: Elements of Reusable Object-Oriented Software: Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides, Grady Booch: 8601419047741: Amazon.com: Books