TY  - BOOK
AU  - Ladyzhenskaya,Olga A.
AU  - Ural'Tseva,Nina N.
AU  - Ehrenpreis,Leon
ED  - Scripta Technica.
TI  - Linear and quasilinear elliptic-equations / 
T2  - Mathematics in science and engineering ; 
PY  - 1968///
CY  - New York, etc. : 
PB  - Academic Press, 
ER  -