Kaplan, Wilfred <br/><br/>Elements of differential equations Wilfred Kaplan  -- Reading, MA  Addison-Wesley Pub. Co.  1964 <br/>xi, 270p.  21cm. <br/><br/> Includes index. <br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations<br/><br/><label>Dewey Class. No.: </label>GC 515.35 K141 1964