TY  - BOOK
AU  - El'sgol'ts,L.E.
TI  - Differential equation: International monographs on advanced mathematics & physics 
U1  - 517.38 
PY  - 1961///
CY  - Delhi
PB  - Hindustan Pub.
KW  - Differential equations
KW  - Differential equations, Partial
KW  - Numerical
ER  -