Beyl, F. Rudolf <br/><br/>
Group extensions, representations and the Schur multiplicator  / 

 - Berlin:  Springer-Verlag,  1982 
 - iv, 278p. Index. Bibl. 
 - Lecture notes in Mathematics   958 .
<br/><br/><label>Dewey Class. No.: </label>512  / B573.GE