Cohen, Abraham . <br/><br/>
An Elementary Treatise on Differential Equations /  Textual Documents 
Abraham Cohen. 
 - 2nd ed. / 
 - Boston :  D.C.Heath & Co. ,  1933. 
 - 337p. :  ill ;  19cm . 
<br/><br/><label>Subjects--Index Terms: </label>Differential Equations G-Mathematics 
<br/><br/><label>Dewey Class. No.: </label>517.38  / C 66 El