00330cam a2200121ua 4500041001000000082001600010100002200026245007700048250001200125260005500137300001100192504000500203  aengh  a671bTHO/IN  aThomas, Howard  .  aIntroduction to metal work, Part 2 / cHoward Thomas.hTextual Documents  a1 / b.  aLondon : bMacMillan and Company Limited , c1960.  a46 ; .  a