Bellman, Richard Ernest,  1920- <br/><br/>
Modern elementary differential equations / 
by Richard Bellman and Kenneth L. Cooke 
 - 2nd ed. 
 - Reading, Mass. :  Addison-Wesley,  1971 
 - xii, 228 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>LCCN: </label>70-100854 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations