"\\\"Gang of Four\\\" design patterns" . . . . "plan book" . . . "Gang of Four design patterns" . . . "Gang of Four" . . "GoF design patterns" . "QA76.64 .D47 1995" . "GoF book" . "GoF" . "0-201-63361-2" . "design patterns documented by the Gang of Four" . . . "Design Patterns: Elements of Reusable Object-Oriented Software" . . . . . "design patterns" . . "Design Patterns" . . "''Design Patterns: Elements of Reusable Object-Oriented Software''" . "005.1/2 20" . "395" . . . . "Design Patterns" . "31171684" . "\\\"Gang-of-Four\\\" book ''Design Patterns''" .