00260nam a2200109Ia 4500008004100000041000800041082001400049100001400063245002600077260003900103300000800142211209s1990    xx            000 0 und d  aeng  a516.24BAL  aBALI, N P  aCO-ORDINATE GEOMETRY   aNEW DELHIbLAXMI PUBLICATIONc1990  a384