00420cam a2200121 a 4500008004100000020004000041100002000081245007300101260004800174300002600222650002800248050002200276081120s2009    ne a     b    001 0 eng    a0618042393 (hardcover : alk. paper)1 aRicardo, Henry.12aA modern introduction to differential equations /cHenry J. Ricardo.  aBoston :bHoughton Mifflin Company,cc2003.  axiv, 445 p. :bill. ; 0aDifferential equations.00aQA371b.R357 2009