Changes

'''International Standard Book Number''' (ISBN) is a number assigned to professionally published books in the modern era. Modern book indexes available on the Internet usually offer the option of finding specific books via their ISBN.<ref>Bradley, Philip (1992). {{cite web|url= http://www.theindexer.org/files/18-1/18-1_025.pdf |title=Book numbering: The importance of the ISBN }}&nbsp;{{small|(245KB)}}. ''The Indexer.'' '''18''' (1): 25–26.</ref>

'''International Standard Book Number''' (ISBN) is a number assigned to professionally published books in the modern era. Modern book indexes available on the Internet usually offer the option of finding specific books via their ISBN.<ref>Bradley, Philip (1992). {{cite web|url= http://www.theindexer.org/files/18-1/18-1_025.pdf |title=Book numbering: The importance of the ISBN }}. ''The Indexer.'' '''18''' (1): 25–26.</ref>

==References==

==References==