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Old 03-31-2011, 12:17 PM   #35
theducks
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Posts: 15,100
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Join Date: Aug 2009
Location: (The original) Silicon Valley, USA
Device: Galaxy Tab 2, Astak Pocket Pro, K4NT
Some of my really old Dead Tree ™ books had SAN or ISBN's without the check digit (9 chars long) ( I think there may have been confusion at the time, that the check digit was not part of the ISBN to be printed)

I backed in the check digit by trying [0-9X] until Calibre gave me a Green ISBN-10 confirmation.
Note: (USA publishers) space or dash were the only separators I saw. never mixed. never interrupted with other characters.
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