TY  - BOOK
AU  - Friedrichs L O
TI  - Lectues on advanced ordinary differential eqaution
T2  - New York University, Institute of Mathematical Sciences, Notes on Mathematics and its Applications. Ed by Jacob T Schwartz
U1  - B331, K5 
PY  - 1965///
CY  - London
PB  - Thomas nelson and sons ltd      
KW  - Equations
ER  -