000 00324nam a2200121Ia 4500
008 220201s1977 xx 000 0 eng d
082 _a625.1
100 _aSharma,OP & Gupta,DL etc.
245 0 _aText book of railways ,Bridges & Tunnels
250 _a4th
260 _bLudhiana:katson publishing house
_c1977
942 _2ddc
999 _c80254
_d80254