Proceedings of the 1989 ACM SIGMOD international conference on the management of data /by James Clifford, Bruce Lindsay & David Maier.   

 - New York  ACM  1989 
 - xii  452p. 
 - SIGMOD Record  12,2,1989 .
<br/><br/><label>ISBN: </label>0897913175 
<br/><br/><label>Dewey Class. No.: </label>005.74  / N892