TY  - BOOK
AU  - Simmons, George F.
TI  - Differential equations: with applications and historical notes 
SN  - 0-07-099572-9
U1  - 515.35 
PY  - 1974///
CY  - New Delhi
PB  - Tata Mc Graw-Hill
KW  - Differential equations
KW  - Mathematics
ER  -