000 00253nam a2200109Ia 4500
008 220201s1990 xx 000 0 eng d
100 _aAGOR R
245 0 _aRAILWAY TRACK ENGINEERING
260 _aDELHI
_bKHANNA PUB
_c1990
300 _a476
942 _2ddc
999 _c90756
_d90756