TY  - BOOK
AU  - ; Lefschetz, Solomon.
TI  - Lectures on differential equations
U1  - 515.35 LEF 
PY  - 1946///
CY  - Princeton, Princeton University Press; London, H. Milford
PB  -  Oxford University Press
KW  - ;Differential equations
KW  - ;Lectures on differential equations
KW  - ;  Lefschetz,Solomon
KW  - ; Elinor Donation
ER  -