00259nam a2200109Ia 4500008004100000041001200041082001100053100001700064245005600081260000600137650000600143221030s9999    xx            000 0 und d  aEnglish  a105.23  aS. B. Mathur 2aA Text Book of Engineering Drawingcby S. B. Mathur  c0  aB