TY  - BOOK
AU  - Simmons, George F.
AU  - Robertson, John S. 
TI  - Differential equations with applications and historical notes
SN  - 9780070530713
U1  - 515.35  
PY  - 1991/// (2018 34th reprint)
CY  - Chennai
PB  - McGraw Hill Education (India)
KW  - Differential equations
N1  - Online book is 3rd ed
ER  -