Mathematical Reviews 

 - United  states American Mathematical society      1976 
 - various pages  cm. 
<br/><br/><label>Standard No.: </label>154731 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Dewey Class. No.: </label>"Bm . 73 .N76, L6.52 (1-3)"