00286nam a22001097a 4500003000800000008004100008041001200049082001600061100002000077245004700097260003200144WUSLLib181231b           ||||| |||| 00| 0 eng d  aEnglish  a515.35bFAR  aFarlow, Stanley  a An introduction to differential equations  aNew YorkbMcgraw-Hillc1994