Beyl, F. Rudolf. <br/><br/>
Group extensions, representations, and the Schur multiplicator / 
F.Rudolf Beyl, Jurgen Tappe. 
 - Berlin :  Springer-Verlag,  1982. 
 - 278 p. ;  25 cm. 
<br/><br/><label>ISBN: </label>354011954X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Group extensions (Mathematics).