TY  - BOOK
AU  - Lefschetz, Solomons
AU  - 
TI  - Differential equations: Geometric theory
U1  - 514.763.8 
PY  - 1977///
CY  - New York
PB  - Dover
KW  - Differential equations
KW  - advanced Calculus
KW  - Calculus
KW  - Trignometry
KW  - Co-ordinate geometry
KW  - Mathematics
KW  - Number theory
KW  - Set theory
KW  - Group theory
KW  - Mathematical sciences
KW  - Vectors
ER  -