TY  - BOOK
AU  - Hellwig, Gunter
AU  - Hellwig, Birgita
TI  - DIFFERENTIAL OPERATORS OF MATHEMATICAL PHYSICS
U1  - 517.7 
PY  - 1967///
CY  - Reading, Mass.
PB  - Addison-Wesley Pub. Co.
KW  - Differential Equations, Partial
KW  - Hilbert Space
KW  - Mathematical Physics
N1  - Bibliography : P. 289-293; Translation Of Differential Operatoren Der Mathematishen Physik
ER  -