000			003400000a22001450004500
245			_aPractical field surveying and computations
100			_aAllan, A.L.
100			_aHollwey, J.R.
100			_aMaynes, J.H.B.
260			_aLondon _bHeinemann _c1968
300			_a689 p.
080			_a528.08:681.3 _bA4
041			_aEN
942			_cBK
999			_c93169 _d93169