TY  - BOOK
AU  - A V Bitsadze 
AU  - Bitsadze, A V 
TI  - Boundary value problems for second order_ elliptic equations . 
U1  - 515.353, BIT  
PY  - 1968///
CY  - New york A
PB  - merican Elsevie
N1  - (north Holend series in applied mathematics a
ER  -