00365nam a2200145Ia 4500008004100000041000800041082001600049100000900065245004500074250000600119260005100125300000800176440000600184650002900190210716s1979    xx            000 0 und d  aeng  a004.21 LEEB  aLee.  aIntroducing systems analysis and design.  a1  aNew DelhibGalgotia Publications Pvt Ltdc1979  a166  vI  aSystem Analysis & Design