TY  - BOOK
AU  - Forsyth A R
TI  - Theory of differential equations: V 1 Exact equations and Pfaff's problem ; V 2 Ordinary equations, not linear
U1  - 515.35 
PY  - 1959///
CY  - N Y
PB  - Dover
KW  - Calculus
KW  - Differential equations
N1  - Six volume bound as three
ER  -