TY  - BOOK
AU  - Sagan,Hans
TI  - Boundary and eigenvalue problems in mathematical physics / 
SN  - 0486661326
U1  - 530.15535 
PY  - 1989///
CY  - New York : 
PB  - Dover Publications , 
KW  - MATHEMATICAL PHYSICS
N1  - NULL
ER  -