Sayers, W.C. Berwick <br/><br/>
Manual Of Classification For Librarians And Bibliographers 

 - 2nd edn. 
 - London  Grafton & Co.  1944 
 - xvi, 344p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>251
<br/><br/><label>Dewey Class. No.: </label>251  / H4