00178nam a22000737a 4500 624.182 DUG Design of steel structures, 2nd edition S K Duggal ddc BK 590723 590723 0 0 ddc 0 624_182000000000000_DUG 0 581768 NIT NIT 2022-08-01 2 624.182 DUG NIT-430 2025-02-04 2024-09-09 2022-08-01 BK