000			00327nam a2200133Ia 4500
008			140317s9999 xx 000 0 und d
082			_a628.11
100			_aColvin,Fred H.
245			_aDrilling and surfacing practice.
260			_aN.Y. _bMcGraw-Hill. _c1948
300			_a523
700			_aStanley,Frank A.
942			_2ddc _cBK
999			_c2273 _d2273