Halmos, Paul R.  1916- <br/><br/>
Introduction to Hilbert space and the theory of spectral multiplicity/ 
by Paul R. Halmos. 
 - 2nd ed. 
 - New York:  Chelsea,  1972. 
 - 114 p.;  24 cm. 
<br/><br/><label>Dewey Class. No.: </label>515.733  / H194i