00286nam a2200133Ia 4500020000900000082001000009100001800019245004400037250000600081260004000087300000800127500000800135650000900143  aNULL  a517.6  aSaxena, H. C. 0aFinite Differences & Numerical Analysis  a-  aN. DelhibS. Chand and Company Ltd.  a322  a137  a-NA-