Unitary group representations in physics, probability, and number theory 
Mackey, George Whitelaw, 1916- 
 -  Addison-Wesley Pub. Co.,  1989 
 - xxvi, 402 pages. 
 - Advanced book classics .
0-201-51009-X
Mathematical physics.
512.2 M173u 1989
                        0-201-51009-X
Mathematical physics.
512.2 M173u 1989