00447    a2200157   4500000002100000001000700021005001700028008004100045082001800086100002200104245008500126250001200211260002900223300001000252700002700262BKB                 07105220200902150921.0                                          a515.382bK29T1 aKelley, Walter G.1 aThe theory of differential equationscby Walter G. Kelley and  Allan C. Paterson  a2nd ed.  aNew YorkbSpringerc2010  a423p.  aPaterson, Allan C.bc