TY  - BOOK
AU  - El'sgol'ts, L. E. 
TI  - Differential equations
T2  - Russian Monographs and Texts on Advanced Mathematics and Physics; v. 4
SN  - 677200609
PY  - 1961///
CY  - Delhi
PB  - Hindustan Publishing Corparation
KW  - Differential Equations
ER  -