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1991-09-01
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ISBN.BAS
--------
This routine validates International Standard Book Numbers
(ISBN). Useful for verifying data input in book inventories
and similar applications.
Written in GW-BASIC for ease of porting to QuickBASIC,
PowerBASIC, what-have-you. There are no absolute line
references so you can just remove the line numbers and use
the rest of the routine as is.
Frank Cox
FidoNet 1:140/53
September 1, 1991