Sociolinguistics  V.1 
ed. by Ulrich Ammon,[et al] 
 - Berlin  Walter de gryter.  1987 
 - xxxii, 854p. 
<br/><br/><label>ISBN: </label>3110096943 
<br/><br/><label>Dewey Class. No.: </label>410.202  / N87.1 "R"