TY  - BOOK
AU  - GILBERT HELMBERG
TI  - INTRODUCTION TO SPECTRAL THEORY IN HILBERT SPACE
U1  - GN513.81H369I 
PY  - 1969///
CY  - LONDON
PB  - NORTH- HOLLAND PUBLISHING
KW  - INTRODUCTION TO SPECTRAL THEORY IN HILBERT SPACE
N1  - MODERN BOOK HOUSE
ER  -