00266nam a2200097Ia 450000500170000000800410001705000160005810000170007424500370009126000400012820251229182505.0251229s9999    xx            000 0 und d  aTA 157 .E5   aDevidayal B. 0aEngineers handbook.cB Devidayal  aIndiab Aggrarwal pub Pvt ltdc1987