00306nam a2200109Ia 4500008004100000082002500041100001900066245005000085250001200135260004100147300000800188240913s9999||||xx |||||||||||||| ||und||  aGS    515.625  AYR/T  aFrank Ayres JR 0aTheory and problems of Differential equations  a1st Ed.  bMcGraw-Hill Book CompanyaNULLcNULL  a295