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Since 1 January 2007, ISBNs have contained 13 digits, a format that is compatible with "Bookland" EAN-13s.<ref>{{citation | url = http://www.lac-bac.gc.ca/iso/tc46sc9/isbn.htm | title = Frequently Asked Questions about the new ISBN standard from ISO | author = TC 46/SC 9 | publisher = LAC‐BAC | place = CA}}</ref>
 
Since 1 January 2007, ISBNs have contained 13 digits, a format that is compatible with "Bookland" EAN-13s.<ref>{{citation | url = http://www.lac-bac.gc.ca/iso/tc46sc9/isbn.htm | title = Frequently Asked Questions about the new ISBN standard from ISO | author = TC 46/SC 9 | publisher = LAC‐BAC | place = CA}}</ref>
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Occasionally, a book may appear without a printed ISBN if it is printed privately or the author does not follow the usual ISBN procedure; however, this can be rectified later.<ref>Bradley, Philip (1992). "{{PDFlink|[http://www.theindexer.org/files/18-1/18-1_025.pdf Book numbering: The importance of the ISBN]|245KB}}. ''The Indexer.'' '''18''' (1): 25&ndash;26.</ref>
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Occasionally, a book may appear without a printed ISBN if it is printed privately or the author does not follow the usual ISBN procedure; however, this can be rectified later.<ref>Bradley, Philip (1992). [http://www.theindexer.org/files/18-1/18-1_025.pdf "Book numbering: The importance of the ISBN"]. ''The Indexer.'' 18 (1): 25&ndash;26.</ref>
    
==See Also==
 
==See Also==
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{{Hub4|Book Reviews|Book Reviews}}
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* [[Template:Cite web]]
    
==References==
 
==References==
 
{{reflist}}
 
{{reflist}}
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