TY  - BOOK
AU  - Simons, George, F 
TI  - Differential equationas: with applications and historical no 
SN  - 0-07-099572-9 
U1  - 515.35 SIM  
PY  - 1998///
CY  - Tata mcgraw hill 
PB  - New Delhi 
KW  - MATHEMATICS
ER  -