Zill, Dennis G.
A first course in differential equations / by Dennis G. Zill. - 5th ed. - Boston : PWS-Kent, c1992. - xiv, 541 p.
Includes index.
0534931545
Differential equations.
A first course in differential equations / by Dennis G. Zill. - 5th ed. - Boston : PWS-Kent, c1992. - xiv, 541 p.
Includes index.
0534931545
Differential equations.