TY  - BOOK
AU  - Goursat, Edouard
AU  - Dunkel, Otto
AU  - Hedrick, Earle Raymond
TI  - Differential equation
U1  - 515.35 
PY  - 1945///
CY  - New York
PB  - Dover publications
KW  - Mathematics
N1  - Includes index
ER  -