Halmos,, Paul R <br/><br/>
Introduction to Hilbert space and the theory of spectral multiplicity 
Paul R. Halmos 
 - a 2-a ed 
 - New York  Chelsea publishing  1957 
 - 114 p  23 cm 
<br/><br/> Cuprinde bibliografie  Donatie din partea d-lui Prof. Dr. Mircea Predeleanu 
<br/><br/><label>LCCN: </label>570012834