TY  - BOOK
AU  - Langer, Rudolph E.
TI  - First course in Ordinary differential equations
U1  - 515.352 
PY  - 1954///
CY  - New York
PB  - Jhon Wiley
KW  - Differential calculas
KW  - Integral calculas
KW  - Ordinary differential equation
N1  - Includes index
ER  -