Cohen, Abraham,  1870- <br/><br/>
An elementary treatise on differential equations / 
by Abraham Cohen 
 - Boston :  D.C. Heath,  c1907 
 - xi, 271 p. ;  18 cm. 
<br/><br/> "Answers": p. 313-337  Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations
<br/><br/><label>Dewey Class. No.: </label>517.38