00255nam a2200109Ia 4500008004100000041000800041082001900049100001700068245002000085260003200105300000800137211209s1981    xx            000 0 und d  aeng  a516.23 N81 SHA  aSHARMA P N J  aSOLID GEOMETRY   bNARAYANA PUBLICATIONSc1981  a470