000
00290nam a2200121Ia 4500
008
220201s2016 xx 000 0 eng d
100
_a
UPADHYAY A K
245
0
_a
RAILWAYS BRIDGES AND TUNNELS
250
_a
2
260
_a
DELHI
_b
S K KATARIA AND SONS
_c
2016
300
_a
272
942
_2
ddc
999
_c
93623
_d
93623