Reissig, R., et al <br/><br/>
Nonlinear differential equations of higher order 
R. Reissig, et al 
 - Leyden  Noordhoff International Publishing  1958 
 - viii  274 
 - Monographs & textbooks on pure & applied mathematics .
<br/><br/><label>ISBN: </label>9001752705 
<br/><br/><label>Dewey Class. No.: </label>515.35  / REI