TY  - BOOK
AU  - Friedrichs K O
TI  - Spectral theory of operators in Hilbert spaces
U1  - 515.733 
PY  - 1961///
CY  - N Y
PB  - Courant Inst of Mathematical Sciences
KW  - Calculus
KW  - Hilbert spaces
N1  - Type copy
ER  -