Ritger, Paul D. <br/><br/>
Differential equations with applications / 
Paul D. Ritger and Nicholas J. Rose. 
 - New York :  McGraw-Hill,  1967, c1968. 
 - xiv, 545 p. :  ill. 
 - International series in pure and applied mathematics. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations.