TY  - BOOK
AU  - Simmons,George Finlay
TI  - Differential equations: with applications and historical notes 
T2  - International series in pure and applied mathematics
SN  - 0070573751
AV  - QA372QA371 .S49.S56
U1  - 515/.35 
PY  - 1972///
CY  - New York
PB  - McGraw-Hill
KW  - Differential equations
N1  - Includes bibliographical references
ER  -