00270nam a2200121Ia 4500082002100000100001900021245002400040260002600064300001600090490003200106500000500138700000500143  a620.007bT583.BE  aTimings, R. L.  aBasic engineeringb  aLondonbLongmanc1973  a275p. Index  aLondon craft studies series  a  a