Forsyth, Andrew Russell,  1858-1942. <br/><br/>
Theory of differential equations  / 
by Andrew Russell Forsyth. 
 - New York :  Dover Publications,  [1959] 
 - 6 v. in 3. 
<br/><br/>v.3... ordinary equations, not linear, ...v.4. ordinary linear equations. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations.