00321nam a2200121Ia 4500008004100000041000800041082001400049100001800063245002900081250001200110260005300122650002400175230711s9999||||xx |||||||||||||| ||und||  aENG  a621bKR-T  aKrishan Kumar 0aTheory of classification  a4th Ed.  c1989aNew DelhibVikas Publishing House Pvt Ltd.  aGENERAL ENGINEERING