TY  - BOOK
AU  - Herrero,Domingo A.
TI  - Approximation of Hilbert space operators
PY  - 1982///
CY  - Boston
PB  - Pitman Advanced Pub. Program
KW  - Operator theory
KW  - Hilbert space
N1  - Includes index; Bibliography : p. 239-247
ER  -