000 00300nam a2200121Ia 4500
008 220201s1982 xx 000 0 eng d
082 _a526.9
_bAGG
100 _aAggarwal,A
245 0 _aT.B of surveying&levelling
260 _bH.tata international publication
_c1982
300 _a272
942 _2ddc
999 _c83411
_d83411