00255nam a2200109Ia 4500008004100000041001200041082001100053100001700064245005200081260000600133650000600139221030s9999    xx            000 0 und d  aEnglish  a105.23  aR. K. Dhawan 2aA Text book of Machine Drawingcby R. K. Dhawan  c0  aB