000 00314nam a22001217a 4500
082 _a604.2
_bWIL
_cL-12, P-55
100 _aWilliamson, George
245 _aTechnical drawing in 20 steps
_cWilliamson, George
260 _aLondon
_bCassell and Co ltd
300 _a92p.:
_bill,;
_c15 cm.
650 _aMCE
942 _cBK
999 _c13039
_d13039