Schwarzenberger, R.L.E. <br/><br/>
Elementary differential equations / 
R.L.E. Schwarzenberger. 
 - London :  Chapman and Hall,  1969. 
 - 98 p. 
<br/><br/><label>ISBN: </label>0412095807 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations.