TY  - BOOK
AU  - Friedrichs, K.O..
TI  - Spectral Theory of Operators in Hilbert Space / 
SN  - 0-387-90076-4
U1  - B313N:g 
PY  - 1985///
CY  - New York 10010 : 
PB  - Springer-Verlag , 
KW  - Spectral Theory
ER  -