A bit about ISBN numbers (was Re: Minor Marx variant)

[Darrell Johnson]

Random House is already listing the longer ISBN #'s for all of their current books.  For anything that was already in existance the longer number  simply adds3 digits in front of the previous number and alters the last digit to a new number.  Their web-site lists both numbers for each title it has a page for.
   
  On a similar topic: Some books have Library of Congress Numbers and others do not.  The impression I have is that titles newly produced after a certain point in time seem to have them while older titles never got them even if they remained active until 1970.  Is this correct?  Can the appearance, or lack there of, of the Library of Congress Number help pin down the printing dates for any titles? Or is this bit of information always useless?
   
  Darrell

Scot Kamins <kamins at ModernLib.com> wrote:
  . From 1 January 2007, ISBNs will be 13 digits long"

- Scot Kamins


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