00272nam a2200109Ia 4500008004100000100001400041245003400055250000800089260004500097300000800142650001200150191201s2010    xx            000 0 und d  aGUPTA,S L 0aEngineering Practical Physics  a4th  aN. DelhibPragati Prakashan Meerutc2010  a177  aApplied