na INLIS000000000000108 20260413042900 0010-0317000106 260413 0 A first course in differential equations Zill, Dennis G. 5th ed Boston : PWS - Kent, 1992 xiv, 541 hlm. ; 24 cm 0534931545 515.35 Zil f 515.35 Kalkulus - diferensial 300295095 295195412 294995412