00441nam a22001817a 4500 9789332555402 004.415 GAM - D Erich Gamma Richard Helm Ralph Johnson John Vlissides Design Patterns: Elements of Reusable Object-Oriented Software 1 ed New Delhi PEARSON 2016 380 computer BK 21367 21367 0 0 0 0 MCK MCK A44 2016-06-25 569.00 0 004.415 GAM - D 21974 2016-06-25 00:00:00 BK