00302nam a2200121Ia 4500008004100000041001200041082001100053100001700064245003700081260003500118300001000153650001700163221030s9999    xx            000 0 und d  aEnglish  a105.23  aR. K. Dhawan 0aText book of Engineering Drawing  bS.Chand & Co.aNew Delhic2007  a4.281  aBB Mechanics