TY  - BOOK
AU  - Simmons,George F..
TI  - Differential equations with applications and historical notes / 
SN  - 0071128077
U1  - 515.35 
PY  - 1991///
CY  - New York : 
PB  - McGraw-Hill , 
KW  - DIFFERENTIAL EQUATIONS
N1  - NULL
ER  -