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