00283nam a22001097a 4500003000400000008004100004082001700045100001600062245004600078260004000124300000900164OSt250829b        |||||||| |||| 00| 0 eng d  a515.62bS27F  aH.C. Saxena  aFinite Differences and Numerical Analysis  aNew DelhibS. Chand & Companyc1986  a358p