00272nam a2200097Ia 450000500170000000800410001705000210005810000170007924500370009626000410013320251229182505.0251229s9999    xx            000 0 und d  aTA 157 .E5 V.4 A  aDevidayal B. 0aEngineers Handbook.cB Devidayal  aIndia b Aggrarwal Pub Pvt ltdc1987