TY  - DATA
AU  - Kurt O. Friedrichs
TI  - Spectral Theory of Operators in Hilbert Space
SN  - 9781461263968
PY  - 1973///
PB  - Springer New York
KW  - Mathematics and Statistics
UR  - https://doi.org/10.1007/978-1-4612-6396-8
ER  -