000			003220000a22001450004500
245			_aTechnical drawing problems
100			_aSpencer, Henry Cecil
250			_a2d ed.
260			_aNew York _bMcMillan _c1961
300			_a9 p.
500			_a80 drawings
080			_a621.7:744 _bS8
041			_aEN
942			_cBK
999			_c53610 _d53610